If Jim Carrey is indeed retiring and they don't want to recast him, I'd be okay with a combination of Stone, GUN, Shadow, and Gerald's legacy serving as the antagonists
yeah i think they set themselves up well to have Stone take over Robotnik's role in the story, so i'm sure that's the route they'll go if they can't have Carrey back for 3
Hedgehog go fast into the SPOIL ZONE
Episode 26 of Sonic X
It was predictable but really well executed.