Board Thread:Speculation, Theories, and Rumors./@comment-25109438-20131223190143/@comment-24356891-20140617055921

Daylight Shadow wrote: It would be very unlikely, in my opinion, but nice to have another playable character than Sonic, though.

If it were considered, I'd imagine it being Tails or Knuckles, you know, the Sonic Team. Better yet. Sonic Team or Sonic Heroes being a choice and you could switch between Sonic, Tails, and Knuckles!