Interestingly, there are some images of old vehicle modes of Movie Optimus Prime and Bumblebee being transported. One Instagram image reveals the location as “I-10 outside of LA” while another taken outside Paramount Studios.
Update: Michael Bay site admin Nelson was kind to come by our forum and explain the mystery behind the “old” Optimus Prime and Bumblebee being transported. It seems they were not meant for filming after all, but for a special red carpet event at Universal Studios Orlando for the grand opening of the Transformers: The Ride 3D on June 20th. Thank you Nelson.