Joseph Gordon-Levitt Playing Alberto Falcone Or Black Mask?

It was announced to have been confirmed by Warner that Joseph Gordon-Levitt signed onto play Alberto Falcone aka The Holiday Killer in Christopher Nolans "The Dark Knight Rises". Now it's been announced that he is not confirmed for the role of Alberto Falcone, who is Carmine Falcone, who was played by Tom Wilkinson in "Batman Begins".
Since it was confirmed that the Alberto Falcone casting was just a rumor, it's now said that Gordon-Levitt might actually be locked for the role of Black Mask instead. So which character will he REALLY be playing? Alberto Falcone or Black Mask?