TF4: Optimus G1 Form

Optimus Prime has been confirmed to be the rusty truck seen multiple times on set in Texas. The rumor was strengthened by the fact that Optimus had a very DOTM form looking body in the Super Bowl teaser and thanks to a store display we can now officially see that Optimus will bear resemblance to his G1 form before he switches to the Western Star truck in Age of Extinction.