Okay... Starting early this year, the dreadful Sonic X voice actors had been replaced by Sega (save for Mike Pollock)... Yes I call them "dreadful" because they're inferior to the old voice acting in Sonic the Hedgehog games. We started hearing things about new voice actors taking the roles later on. These people will voice their respective characters starting with Sonic Free Riders, Sonic Colors, and future games. So far confirmed, these have been the voice actors I've heard involved:
Roger Craig Smith: Sonic the Hedgehog
Kate Higgins: Miles "Tails" Prower
Mike Pollock: Dr. Eggman
Kirk Thornton: Shadow the Hedgehog
Travis Willingham: Knuckles the Echidna
If anybody manages to hear about more new actors confirmed, report to me immediately. Oh, and thanks! You're great help.