I wouldn't be surprised if the next game we get Sonic and Sage team up to save Eggman and you have to use both their abilities in tandem to defeat the big bad threatening the world.

NegativeSoul said in comment #2594537:

I wouldn't be surprised if the next game we get Sonic and Sage team up to save Eggman and you have to use both their abilities in tandem to defeat the big bad threatening the world.

Didn't Sage's debut game involve something adjacent to that in the end?
"Saving the world Eggman's on" counts as "saving Eggman," right?

Alanis, killed by an artificial intelligence named Sage