Board Thread:Questions and Answers/@comment-27182352-20170224120102/@comment-679780-20170225034511

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.