This is my version of the 2008 live-action film.
In the year 2008, Earth is visited by a cyberorganic race called the TRANSFORMERS. They've have come from a distant planet called Cybertron with one goal, victory! for over millions of years two warring factions, the AUTOBOTS and DECEPTICONS, have battled over control of both the planet and the allmighty AllSpark. Having drained te planet of it's energon resources, the Autobots hurtle the AllSpark into deep space and out of the hands of the Decepticons. But now they've found it, on Earth 2008 A.D., along with their long lost leader Megatron. So now the war among the stars has spread now to the very streets of Detroit as Optimus Prime, his elite Autobot task force, and a human named Sam "Sparkplug" Witwiky must race to find the AllSpark and save the Earth.
Optimus Prime (Peter Cullen) - Peterbilt 379: The heroic leader of the Autobot. He originally was a workerbot on Cybertron under his 1st name Orion Pax, fed up with maunal labor. So he joined the Decepticons as an undercover agent infiltrating the Autobots. He saw them as the future, a militaristic utopian government with Megatron as supreme leader of Cybertron. But after giving them secret plans on a "Transforming" capabilities from the Autobots, Megatron betrayed him, killed his mate Elita One for spite and left him for dead. On the verge of shutdown, he was revived by Vector Prime and giving the holy rank of Prime Transformer. Orion now given a new sense of honor and valor rechristened himself OPTIMUS PRIME and made it his goal to exterminate the evil Decepticons and lead Cybertron into a golden era of peace. He quickly rose through the ranks of the Autobots forces and after Alpha Trion died, he named himself leader of the Autobots.
Megatron (Hugo Weaving) - Cybertronian Tank/Dragon: The evil and all powerful leader of the merciless Decepticons.