update: this story is false.
Joseph Gordon-Levitt (and the rest of the cast of Inception) has been heavily favored to join the cast of Christopher Nolan’s next Batman movie. Now with Tom Hardy in place as Bane and Anne Hathaway as Selina Kyle, JGL will join the cast as Alberto Falcone.
You may recall Carmine Falcone was played by Tom Wilkinson in Batman Begins, and his empire was shattered by Batman and Harvey Dent in The Dark Knight. Alberto Falcone is his son in the Batman fiction, and may be entering the story to reclaim the family business.
However, Nolan has borrowed from The Long Halloween before, and its likely that Alberto won’t just be another mob boss but will instead be The Holiday Killer. Holiday was a serial killer whose first murder occurred on Halloween, (then Thanksgiving, Christmas, etc) and continued until the following Halloween with the murder of Carmine Falcone.
As of The Dark Knight, Carmine is still being held in Arkham, after a dose of Scarecrow’s psychotic drugs. Its unknown how this might fit in with Bane or the possibility of Catwoman, but both of those characters are tied heavily to Gotham’s organized crime.
As casting news begins to slow down and filming not to far off, the full story is still hard to decipher. The Dark Knight had twists audiences didn’t expect that didn’t come from set reports and no script was leaked in advance. If The Dark Knight Rises can continue this momentum and use the wealth of characters to give the story life and depth rather than crowd it, we might have the first super hero movie series with a good third act.