Optimus Prime returns in Transformers: The Last Knight, which is set three years after the events of the previous film. Having been frozen in the vacuum of space, Optimus has been drifting on the far reaches of Earth's solar system for some time. However, he later crash-lands on Cybertron, its atmosphere reviving him. He then confronts the being currently in control of the planet, a powerful sorceress named Quintessa, who professes to be the maker he is searching for. Optimus is easily subdued by Quintessa, who convinces him that he destroyed Cybertron and reveals that the Earth is actually Cybertron's "ancient enemy" Unicron. Redubbing him "Nemesis Prime", Quintessa brain-washes Optimus and tasks him with retrieving her stolen staff, with which she plans to drain Earth/Unicron's life force so that Cybertron can be restored. Nemesis succeeds in retrieving the staff, but is hindered by Bumblebee, whom he engages in a fierce duel. Nemesis nearly kills Bumblebee, but when the normally mute Bumblebee suddenly speaks, urging Prime to remember who he is, the sound of his oldest friend's voice is enough for Optimus to return. However, Megatron, revealed to be in league with Quintessa, swoops in and steals the staff from Optimus. Prime is then attacked and sentenced to death by the Guardian Knights for aiding Quintessa, but he is saved by Cade Yeager, who convinces Optimus to correct his mistake. Optimus leads the Autobots in the attack on Quintessa's lair, during which he slays the Infernocons and defeats Megatron. Optimus then attacks Quintessa, distracting her long enough for Bumblebee to shoot and seemingly vaporize her. At the end of the film, Optimus and the other Autobots return to Cybertron, unaware that Quintessa is actually still alive.
In "Predacons Rising", Bumblebee, Jetfire, Jetstorm, Optimus, and Sentinel chase down the fugitive Wasp, but lose him to Swoop while bickering about what to do with him. They go after Wasp, only to find out that Blackarachnia has captured him and turned him into Waspinator. When Waspinator malfunctions and explodes due to the instability of the transwarp field that mutated him, Blackarachnia contains the blast with her webs, resulting in an explosion that consumes them both. Optimus is saddened by this, unaware that she and Waspinator are still alive on another planet inhabited by animals.

Hero Optimus Prime was the first new-mold Optimus Prime toy in the Generation 2 line. He transforms into a Kenworth truck of unknown model with a flatbed trailer. The truck and trailer form his robot mode, but cannot disconnect. His primary gimmick is an air-powered missile launcher that uses an air bellows attached by hose to launch his large, hollow, soft-rubber-tipped missiles. The bellows and missiles attach to his back in robot mode. His rifle plugs into the launcher's main body in truck mode.
As this is the Unicron Triogy we're talking about, it should come as no surprise that Prime can transform into a Super Mode by combining with his trailer, which becomes a massive winged backpack and a pair of large boots, generally evocative of God Ginrai. To complete his Super Mode look, a small lever of the back of Prime's head raises his traditional mouthplate into place, covering his Optimus Primal-style mouth slot, and two "crests" fold out from either side of his helmet. Hasbro's instructions and stock photography for the figure orient the wings so that the two cannons point over Prime's shoulders, but Takara's have wings arcing up past his shoulders, with the cannons slung under his arms. This was the way Prime appeared in the cartoon series, and was the way all subsequent Hasbro redecos of the toy were positioned. In Super Mode, Prime is a rather top-heavy robot, and his hip joints are not that tight, which makes standing him up a challenging prospect.
This exclusive redeco of Optimus Prime features darker shades of red and blue than his other releases and has extensive paint applications to resemble his on-screen appearances in The Last Knight, particularly his Nemesis Prime alter ego seen in the film. To that end, he features movie-accurate flame patterns, which are larger and more elaborate then the ones on the regular release or the SDCC exclusive, on his vehicle mode exterior and robot pectoral armor. His eyes and sword are also painted metallic purple, but his shield is completely unpainted for some reason.

The Hasbro website explains it best: "The rogue DARK NINJA MASTER was exiled to a cave beneath Arashikage Mountain for betraying the ninja clans. After finding the Moon's Blood, a mystical stone of great power, he was able to channel the energy of dead ninjas, making him almost unstoppable. Seeking revenge, he has emerged from his subterranean prison to destroy all ninjas. Only two people can stop him: STORM SHADOW and SNAKE EYES. The two adversaries must join forces, for only by working together will they be strong enough to defeat this evil super-ninja."
This figure was released during the short-lived period when Hasbro was treating the Beast Wars as an extension of the Autobot/Decepticon war, and Optimus Primal was presented as being the same character as Optimus Prime. This was soon relegated to the realms of micro-continuity when the Beast Wars animated series began and clearly established that the two Optimuses were different characters, but the toy remains one that was officially branded as Prime, and is consequently listed here.
Then he dreamed of awakening, only to find his troops smashed. Realizing his only hope for survival lay with Cybertron, Optimus then boarded the ship the Autobots were repairing, and travelled back to his home planet. Arriving on Cybertron, he found it completely under Decepticon domination. Optimus then met an old Autobot codger who pleaded that he return to Earth to gather a force that could overthrow the Decepticon’s regime. Optimus remorsefully told the old Autobot that there could be no reinforcements from the planet Earth. The two Autobots were then swarmed by Decepticon police officers, who Optimus fought until his dying breath…

In the two-part episode "Megatron Rising", Optimus loses his composure over the recent numerous Decepticon attacks coupled with the fact that Prowl had secretly placed the Dinobots on an island off the coast of Detroit instead of destroying them. He has Ratchet confiscate the Allspark key from Sari, which he loses when he is ambushed by Blitzwing. Optimus also fails to stop a newly resurrected Megatron from acquiring the Allspark. He defeats Megatron by overloading the Allspark in his chest with Sari's key. In the process, the Allspark shatters into countless pieces, scattering all across Detroit.
The third United Optimus Prime toy is a redeco and slight retool of the Deluxe Class figure from Hasbro's 2010 Transformers toyline, itself an homage to Prime's Generation 2 "Laser" form. The toy features translucent blue plastic as opposed to Hasbro's orange, red paint is used on the biceps instead of blue paint, extra red paint applications on the knees like the original's sticker detail, and more broken-up red apps on the shoulders. Silver detailing was added to the cab mode on the grill, the bumper, and near the doors. The blue plastic in cab mode is now black plastic to make the figure more accurate to the Generation 2 original. The gray plastic is changed from the Hasbro version to more closely match the 2006 reissue of Laser Optimus Prime. Black paint was applied to the cab mode to mimic the fade from red to black on the original Laser Optimus, but still includes a flame deco like the Hasbro version, only in a different design. It lacks the roof-mounted rubsign of the Hasbro version, instead including Autobot insignias on the cab doors. (Disappointingly, they are Generation 1 insignias, rather than Generation 2 ones!) Additionally, a retool was made to the peg on the inside of his right shoulder, to make it shorter and wider than the Hasbro version, allowing it to move freely without hitting the torso, unlike the Hasbro release.

Although the character was redesigned to some extent, like the other characters in the film, many classic design elements remain in his robot mode including a predominantly red torso, primarily blue legs, the presence of windows in his chest, smoke stacks on his shoulders, and a head design influenced by the original, featuring the iconic faceplate and ear finials. The faceplate is able to retract to reveal a mouth. His weapons include his iconic ion blaster stored in the form of the fuel tanks on his back, and a shell cannon stored on his back, two retractable energon blades that extend from both forearms, which is a homage to Prime's energy axe in the Generation 1 animated series, two retractable energon hooks on both of his forearms, and bladed knuckles. The trailer contains an energy axe, a shield, and flight gear. In the later IDW comics, he displays the ability to produce a holographic driver.
Exclusive to LDH Shop, this redeco of the Music Label Convoy toy is utterly ridiculous and was created as a promotion for the Japanese pop band EXILE. While Convoy himself has EXILE written on his right forearm, his trailer sports the "Love Dream Happiness" tagline of LDH Inc.[1], as well as the "EXILE Perfect Year 2008" logo of the "EXILE Perfect Year 2008 Ultimate Best Box" boxset, which was released some months after he was.

During the period between December 26 2010 and January 31 2011, Hasbro ran their "Supercharge Your Holidays" promotion: for every $20 spent on Hasbro-branded product, customers could receive a free, random product from a list provided by Hasbro. Among the items on the list was "Transformers Activator & Speed Stars Mini Vehicle". According to this discussion thread on Allspark.com, Rally Rumble Optimus Prime (as the figure is listed in the thread) was one of the figures distributed.

It was expected that the release of a new movie would involve the production and release of associated toys from Takara and Hasbro. Images surfaced, on-line, of some toy prototypes, notably Starscream and a new Decepticon who was to be named Blackout, along with packaged samples of movie preview "Protoform" Optimus Prime and Starscream toys. Similarly, fans found preliminary artwork of multiple characters, although it was not known at the time how close these were to the final designs. The designs were significantly different from those of the Generation 1 characters with the same names. Reactions varied widely: some fans objected strongly to the designs, occasionally going so far as to threaten a boycott if the designs were not changed to be more traditional, while others liked them. The issue became a divisive one, as detractors accused supporters of lacking respect for the franchise's history, while supporters accused detractors of being "stuck in the past", and not accepting change.
Optimus once considered having the unruly Dinobots shut down before they could accidentally cause damage, but they proved their worth during a sudden Decepticon attack. S.O.S. Dinobots When the Insecticons gained enough power that they'd be able to overrun Earth in seven days, Optimus Prime was forced to negotiate an alliance with the Decepticons in order to defeat them. Harvest of the Insecticons Following the disappearance of Grimlock and Swoop, Optimus attempted to stop the other three Dinobots from attacking the Decepticon base, and was mauled for his trouble. The distraction at least allowed Wheeljack to take a scan of the rogue Dinobots. Day of the Dinobots - Part 1
This Optimus Prime is a redeco of the figure above, featuring red wheels and various Tech Spec-sque patterns on the legs & chest which can be decoded with their transparent red weapons, which is molded in a sprue similar to the ones used for the Arms Microns kits & Robots in Disguise (2015) Mini-Con figures. He can use any weapons included in this set, although his primary weapon is an axe.
Optimus Prime is among the three Autobot figures available to play in the Monopoly Transformers Collectors Edition game.[28] As the figurehead of the entire Transformers franchise, Optimus Prime has been on more pieces of merchandise than can be stated here. Several statues and busts of Optimus Prime as well as Optimus Prime themed objects have been released by various companies since the return of Transformers to prominence, such as the "Optimus Prime Oral Care Station". Other figures released include various PVCs as part of Takara's "Super Collection Figure" line, which were later imported as part of Hasbro's "Heroes of Cybertron" series. Larger "Mega Collection Figure" PVCs were articulated and came with energy axe and gun figures. As part of the merchandising wave for the first Transformers film in 2007, Hasbro's Playskool line released a Transformers-themed version of Mr. Potato Head based on Optimus Prime. To keep with the potato theme, the toy was labeled "Optimash Prime" and the packaging included the slogan "More than meets the fry", a potato-oriented version of the Transformers slogan "More than meets the eye".

Sometime after the Autobots and Decepticons awoke in the 1980s, the original Megatron gained access to one of Earth's Voyager spacecraft and inscribed a message on the disk on board. In the event that he lost the War, Megatron left instructions for the descendants of the Decepticons to use transwarp technology to travel to Prehistoric Earth, locate the Ark, and change history by killing Optimus Prime. The Agenda (Part 2)
Optimus had Bumblebee and Huffer plant false information to mislead the Decepticons. As the Autobots were in need of a new power source, he sent Cliffjumper to find Doctor Heath Blaisedale and had to apologize to the doctor after Cliffjumper kidnapped her. Persuading her to help them, the Autobots traveled to the solar plant to make use of her solar reactor, only to find the Decepticons were already planning to attack it. While the other Autobots re-energized, Optimus protected them from an attack by Starscream, Thundercracker and Skywarp. Ravage abducted Blaisedale as a diversion, forcing Optimus to lead a team and rescue her. When the team returned, the plant was already under attack and Optimus helped the Dinobots drive them off. Unfortunately the Dinobots totaled the plant in the process, and Optimus promised Blaisedale the Autobots would help her rebuild. In return, Blaisedale organized a meeting with the President of the United States so the Autobots could forge an alliance. Sun Raid (Listen 'n Fun)
The Autobots continued to guard humanity in secret for many years, until one day in the 21st century when Ratchet was captured by a human group known as Skylogic Systems. Upon investigating the organization, Optimus Prime and Bumblebee came into contact with the Lone Gunmen, three humans who were also on Skylogic's tail for their role in creating a dangerous virus. Learning from them that Ratchet's DNA was part of the concoction, the Autobots joined forces with the humans and helped track down David Simmons, the man responsible for releasing the virus. One interrogation later and they had the address to the Skylogic base, though Prime's size prevented him from easily infiltrating the building, so he left the rescue mission up to Bumblebee and the Gunmen. Once Ratchet was saved, the Autobots parted company with their new human friends in an attempt to lure away any Skylogic pursuers. The X-Files: Conspiracy: The Transformers
The cab transforms into the robot mode of Optimus Prime himself, with the addition of a pair of removable blue fists that plug into his headlights. The fists themselves do not store anywhere in vehicle mode, but can fit easily in Prime's opening chest compartment (originally designed to accommodate two Diaclone driver figures). Prime is armed with a black laser rifle that, due to design, he cannot hold straight.
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