Quote Originally Posted by Bumbleb33 View Post
Hasbro would not allow Bay to not include him, Bee is the cash cow of the franchise because kids love him.
Also because Optimus Prime and Bumblebee are on Hasbro's "never perma-kill" list, thanks to the reaction that Hasbro got after they allowed Sunbow to kill off Optimus Prime in 1986's TFTM.