Prologue:
"There are mysteries to the universe we were never meant to solve. But who we are and why we are here, are not among them. Those answers we carry inside. I am Optimus Prime, and this message is to my Creators: leave planet Earth alone, 'cause I'm coming for you!"
Those were the last words heard spoken by Optimus Prime as he transmitted them into space, following them into the cold vastness. He floated along seemingly lifeless in the harsh vacuum until the gravity of the junkyard planet below sucked the prime sucked him to the surface.