Think about it, Michael Bay said he didn't want to direct another Transformers film until he went to the opening of the Transformers Ride. Maybe, just maybe, he wanted to have the main Bot from the ride in the 4th movie as a nod to what inspired him to want to do it again.
Also, the bio for the character sounds like something I could see translated into film.
It said he is a new recruit, never been in combat with Decepticons before. They also say he's agile and fast (Perfect for a race car driver, no?), and he is eager to prove himself in battle.
What do you guys? Would this work? If not who would you say the Sonic RS is?