The Energon Pub

on IMDB they have listed .... Transformers (voice)
who will he be

Probably won't be playing anybody.

I wouldn't trust IMDB to be accurate at this point. Right now, as far as Transformers is concerned, IMDB is nothing more than a giant wikipedia full of people who know nothing concrete and are full of wild speculation.

But that's just my take on it....

I've never seen this guy in any of his previous roles, but, if he is doing a voice in the movie, from looking at his pics and the list of previous work my guess would be that he would do Brawl or Blackout.

I'm pretty sure he was just hired as a stand in voice so the actors had something to act with on set.