Board Thread:Questions and Answers/@comment-27182352-20170224120102/@comment-26942054-20170225080845

Mystic Monkey wrote: As much as I'd like to see more than just Classic Sonic, Tails and Eggman, I'd rather wait until more footage of the game comes out.

My personal headcanon/guess is that Classic Sonic from Sonic '17 actually comes from Sonic Mania. Dr. Eggman may have changed history, replacing the Classic era of Sonic's life with that of Sonic Mania.

So it could be possible Classic Tails will return along with Classic Knuckles could be in Sonic '17 but I'd rather not speculate that far until more footage is shown.

As for Classic Amy is Sonic Mania, I'd support that idea. She may end up as a DLC or something. It should be more playable characters other than Classic/Modern Sonic instead of cheerleaders. It would work.