Any voices celebrity or industry welcome. Whether it's just an actor or a specific character/voice line up. John Goodman did some good work as Bulkhead....I mean Hound. But the whole time he was doing that role I couldn't help but feel like he'd make a really good G1 style Ironhide. I think they oughta keep him on the payroll for that very reason in Bumblebee 2. I honestly don't feel like any voices are set in stone for the cameo characters from BB. I think it'd be great if Sue Blu and Jeffery Combs got to reprise Arcee and Ratchet, and I personally believe that Steve Blum oughta be THE default Starscream unless he's absolutely unavailable or unafforable. I wanna see Mark Hammil take on a meaty character, whether it be Bot or Con. I think he could do a good Marvel Shockwave or a particularly good Wheeljack. If Bee gets his voice back I'm not married to the guy from BB. I'd like to see Will Frielde have another crack at it, or another Autobot car. Soundwave whether its Jon Bailey or not should keep the G1 style voice. I think the cassettes should talk and Ravage should be Russian and Laserbeak should talk like DOTM and Danny DeVito should voice Rumble and/or Frenzy. Megatron I would be fine with Frank Welker but I would die happy if David Kaye ever got to do his Megatron on the big screen. He could even do the voice for an opposing General to Megatron like Straxus. In the bizzaro world where Sky-Byte makes it into the new TFCU, I think they should have a goofy musician or comedian voice him. Childish Gambino, Chance the Rapper, Bill Burr, Trevor Noah, or Gabriel Iglesias could all potentially do their own "thing" with the concept. Or if I had to pick an industry actor for Sky-Byte, John DiMaggio or David Kaye.