As much as I love Peter Cullen and Frank Welker I believe that it's time for a change. If there's a new series in the next 2-3 years I would like to see Corey Burton possibly return to voicing Megatron but if we possible wanted to see a new actor Id maybe like to see Clancy Brown try his hand at Megatron. Now the really hard choice would be who to voice Optimus. Peter Cullen is pretty much Optimus Prime but as I said there might be a time when someone else might voice Optimus. This one I really can't say. I know Peter can't voice Optimus forever but it's so hard to imagine Optimus to be voice by anyone else. If any of you can think of anyone else let me know because if you ask me, finding a new voice for Optimus Prime is like getting a new puppy when you're old one dies. I mean sure it's a puppy but it's just not the same.