Spinoffs for other characters?

[Unidus]

When I think of a cool idea for a character spin off, Shadow comes to mind. And, the idea for a game that comes with it would be sort of like Shadow's version of Batman: Arkham City. Also, with a mix of ideas from the Shadow the Hedgehog game. There could even be a karma/reputation system involved. The player would essentially get to decide what direction Shadow takes throughout the game.

Of course, this is all very nondescript and vague xD