The design of new Optimus Prime has been exposed in the latest display of the upcoming Hasbro Transformers 3 Toy. In the Transformers 3 Movie, Optimus Prime will combine with his trailer and form a power up mode. The flying unit in the Transformers 3 Trailer 2011 is highly believe as the same one shown here.
This is the offcial design of Optimus Prime ancestor, Sentinel Prime! In the official Tranformers 3 movie trailer, he is one of the Autobots inside the Ark that appeared at the last scene. The below images are the Hasbro Transformers Movie 3 Dark Of The Moon Leader Class Sentinel Prime, after he change into earth form, which looks like a advance firetruck.