It has been revealed that JGL will be playing Alberto Falcone, son of Carmine Falcone who incase you didn't know was a villain in Batman Begins. According to ShowBlitz:
Joseph Gordon-Levitt's will play Alberto Falcone, son of Mafia chieftain Carmine Falcone, who Tom Wilkinson played in “Batman Begins,” insiders tell Variety's Jeff Sneider. The younger Falcone would bring Christopher Nolan’s “Batman” trilogy full-circle, and fits with the director's stated intentions for continuity and “realistic” villains.
With recent rumor emerging including Marion Cotillard (who also starred in Inception) playing Talia Al Ghul (Daughter of Ras Al Ghul who was played by Liam Neeson in Batman Begins), and Juno Temple being in the film, this is the first confirmation as far as the rumors go.
So there you have it. He's not Robin, Riddler, Joker, black Mask, or Nightwing. He is indeed Alberto Falcone aka The Holdiay Killer.
What do you think of JGL joining the cast and playing Falcone?
