...for part of Age of Extinction. We know that at some point in the movie, perhaps the beginning, Optimus will be an old, rusty Marmon '97 cab-over semi truck, which implies that the corresponding robot-mode - if its shown on film - will be distinct from any one we've seen so far in the films. We also know that at some point he'll take on a new vehicle-mode, a custom built Western Star semi truck, and will have a new, corresponding robot-mode. However, based on the following screen-captures taken from the first trailer for Age of Extinction, it appears that he'll have his old robot-mode for part of the movie. What do you think is the explanation for this? Do you think Transformers can use old robot/ vehicle modes based on memory?