This was from long ago, but I heard of it only recently: IMDb :: Boards :: Untitled Transformers Sequel (2014) :: Gary Chalk should do a voice There was a tiff between voice actor Gary Chalk and producer Don Murphy. The gist is that Murphy turned down Chalk for a voice role (claimed to be OP) in a live-action TF, which upset Chalk a lot. But that's all that was mentioned. Can someone please clue me in on what really happened? Because it's a real shame that an established voice actor like Chalk doesn't return to TF, whether for the films or any other continuity. It does sound like a snub from Murphy, and I agree it wasn't deserved, but if he was volunteering to play Optimus Prime when the fans wanted Peter Cullen for the job then what could he expect? I'd just like him to bury any ill feelings that exist, if they do, and return to a TF feature (whether a film or a series).