Besides his voice and cool faceplate, Optimus Prime's most distinctive feature ... when Optimus' alternate mode was swapped out for a 2015 Western Star semi-truck. Both of these trucks are ...
While Optimus Prime opens the film in the form of a rusted out 1973 Marmon cab-over truck, the autobot leader eventually takes the form of an awesome 2015 Western Star 5700-based semi. We'll see ...