Leaving his home universe, the Optimus Prime of Primax 895.0 Gamma was gathered in Axiom Nexus by its Optimus Prime, along with a roster of other Optimus Primes and their kin in a group known as the Convoy, in which he was redubbed "Hero Prime". Optimus Prime bio in Club magazine #49 A multiversal cataclysm in a universe seeded with Rarified Energon and an invasion by natives from the negative polarity universe had called them into action. Since Matrix bearers were usually never allowed into Axiom Nexus, this was a grave threat indeed! Invasion Prologue
Based on the Classics toy line, the Timelines 2007 story is set 15 years after the end of the Marvel Comics story (ignoring all events of the Marvel UK and Generation 2 comics). According to exclusive bio information in the Transformers Collectors' Club magazine #15, Hot Rod followed Optimus Prime back to Cybertron from the Planet Klo. Once back, Hot Rod took up racing, but after a while found it pointless. Optimus Prime assigned to help organize the millions of Cybertronian refugees who returned to their home world. Hot Rod chaired the Cybertron Grand Challenge race, a race which featyred combined Autobot/Decepticon teams. With his maturing Hot Rod changed his name to Rodimus and was chosen to return with Optimus Prime to Earth to stop Megatron. Optimus Prime returned to Earth commanding Bumblebee, Cliffjumper, Grimlock, Jetfire, Mirage and Rodimus. When the Cybertronians Skyfall and Landquake arrive on Earth unexpectedly, Megatron attempts to destroy them, but Optimus Prime and his Autobots are able to drive Megatron away. Rodimus is wounded on a mission with Optimus Prime, before being brought back to the Autobot base.
If Optimus led his troops back to the Decepticons’ poison lab, the convoy happened upon the Decepticons hauling barrels of poison out of the poison lab. Windcharger and Ironhide suggested two different plans to Optimus: Windcharger wanted to use his magnetic powers to cause a confusion, while Ironhide wanted to simply go in for a full frontal assault.