As long as Sonic is ostensibly a multi-platform character I don't want them to add anymore characters from his franchise but him as anything other than trophies and assists. If they want to add another Sega rep that's fine (and they have, although Bayo's pretty much a Nintendo character at this point), and there are plenty of avenues to take but I cannot in good conscience start wishlisting for Sonic characters to fill up roster spots.
No, not even him.
Back from the bellows of hell
Back from the back of a jail in a cell
Back from the common decrees to the common degree
Back to the streets from the East
Back to the belly of beast
Back to the place of my peace
Back to me holding my piece
Anything working disturbing that peace
Will certainly meet the deceased, capiche?