Of course, there are plenty of other candidates for mayhem. In the two films to date, Nolan has left the door open for a raft of villainous comebacks.
Harvey Dent, aka, Two-face, fell to his apparent demise at the end of
The Dark Knight
, but mysteriously was never confirmed. Same goes for
Ra's Al Ghul, especially if Nolan goes by comic lore where the character is able to regenerate.
Known to be alive are The Scarecrow, currently incarcerated in Arkham Asylum, and Mob boss Sal Maroni - whose hobbling by Batman might make him hungry for a return to power.
Just one thing. Don't bring all of them back, for goodness sake. Remember