After his attack on Optimus Prime, Megatron was thrown out of the Ark when Blackarachnia activated the ship's defense systems. However, he was not thrown far enough and the Predacon managed to reenter the Ark and blast the Autobot leader, decisively erasing the Maximals from the timeline. A Change to the Agenda This had the effect of producing a wildly different timeline.

Most notably in terms of new tooling, the panels on the undersides of Powermaster Optimus Prime's forearms feature slots under the fists, which allow the guns to tab in and be held much more stably than with Ultra Magnus. And due to the amount of empty space in the cab area in vehicle mode, Powermaster Prime can fully transform without the need to remove his head.
This mold was redecoed into Universe Optimus Primal and Beast Wars Telemocha Series DX Convoy, and retooled into Beast Wars Reborn/Beast Wars Tenth Anniversary versus pack Optimus Primal. Takara also created multiple special variants, including all-gold (from Tele-V Magazine, only ten awarded), red and gray (Tele-V again, but only one awarded), and blue-fur (a Comics Bom Bom design-contest prize, only five awarded).
One of the taglines of the Transformers universe is “more than meets the eye.” It’s meant to suggest, of course, that these robots are not just robots; they can turn into vehicles and boomboxes and dinosaurs. But some of the characters themselves tend to be more than meets the eye. In fact, they can become other Transformers. Megatron becomes Galvatron, Orion Pax becomes Optimus Prime, and Bumblebee becomes Goldbug.

4. Collectability/Internet/Ebay: While Lego has always been a somewhat collectible product, the age of the internet has increased the collectability of Lego. Nostalgic adults came together on the internet to trackdown and re-acquire sets from their child hood. I think Lego has embraced this as evidenced by large limited edition sets aimed at the adult market. This is also evident in the increase in tempo of development of sets and themes that drive the collector to want to buy more and more; which overall is good for Lego. In the past, an individual set and theme seemed to have more life than they do now.
While exploring Cybertron's hemisphere of darkness, Optimus Prime became severly damaged, and unable to return to the hemisphere of light. Having been able to send out one last message before his memory was badly damaged, Optimus found himself unable to distinguish friend from foe, and would join (or rejoin) whichever faction found him first. Optimus Prime Is Back

This gold vacuum metallized (save for his black joints, which they were made out of unpaintable plastic) Protoform Optimus Prime figure was featured as a Lucky Draw giveaway (along side similarly gold vac-metal versions of Voyager class Optimus Prime and Protoform Starscream) in the December 2007 issue of TV Magazine. Released in 2008, only 5 pieces were made, making it one of the rarest Lucky Draw figures; the images at right represent the only known photographs of it. 
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