Earlier today we got a look at two of the vehicles in the movie already.
Now Michael Bay has just released the official truck form for Optimus Prime via his website. It came with this note:
The completely upgraded, custom-built Optimus Prime from Western Star (a subsidiary of Daimler Trucks North America).
Transformers 4 will be directed by Michael Bay, from a script written by Ehren Kruger. The cast includes: Mark Wahlberg, Kelsey Grammar, Nicola Peltz, Stanley Tucci, Jack Reynor and T.J Miller.
Get ready to roll out on June 27th, 2014!