Joshua "Josh" Keaton is an American actor, voice actor, singer and music producer and will be playing an unknown role in Transformers: Prime. You can check out the interview where he talks about his role in upcoming games such as Spider-man Shattered dimension and Transformers: Prime or read the section below:
"Is there anything you can tell us about Transformers Prime (story, characters, etc.)? Were you and Dan Gilvezan able to talk about the Bumblebee character at all while working together on Shattered Dimensions?"
"I can’t say anything about the story yet and I’m pretty sure it’s already out there that Peter Cullen and Frank Welker will be returning as Optimus and Megatron. Dan and I actually did have a little discussion about me taking all of his roles, but I reminded him that it hasn’t actually been confirmed anywhere that I’m going to be voicing Bumblebee. (wink)"
Does this mean he`ll be doing the voice role for Bumblebee? Only time will tell ;)