The director just said days ago he wants more canon characters in the sequel!!!,and he is thinking about not only 3 movies, but four or even five, it depends how good the sequel goes
i would have amy, and knuckles in the second part, with Knuckles as the "bad guy" while in reality Eggman is making the moves, then in the third, have Shadow as the "villain", and then on the fourth one have shadow's redeption, and have him and sonic team up to defeat metal sonic, kinda how Kong and Godzilla are going to team up to destroy mecha godzilla
The director just said days ago he wants more canon characters in the sequel!!!,and he is thinking a