Seriously though, it was hinted in the last film that Joker's actions had opened the floodgates. Now, according to Joker, more crazies would begin appearing.
The problem is that none of the characters show that.
Bane is not a freak, Catwoman is not a freak. So, to have a mob boss as the third villain would really show that Joker's actions counted for naught.
Don't you think the third villain should be a freak? Like Hatter or Hugo Strange? To show Joker's influence on the city a bit more?
A mob boss role would be a waste of Levitt's talents. I would relish the chance to see him play a truly unhinged character like Hugo Strange or Jervis Tetch. Mob boss characters aren't deep, they aren't new or exciting, they look and sound very dull compared to bombastic personalities like Two-Face and The Joker. It's the last movie, why waste time with
more petty gangsters?
Levitt could be playing a younger version of Frank Pettit, a militant cop who went nuts during
No Mans Land. I always liked the character and wouldn't mind seeing him return as an overzealous member of the Batman taskforce.
Alberto Falcone doesn't need to be a serial killer. On paper, Alberto is "The Good Son" of the Falcone family, ala Michael Corleone in the first "Godfather". Pretty much everyone tries to keep him out of the family business, but he's desperate to prove himself. Alberto should be the first mob boss to utilize the "Freaks" as members of the regular mob.
"Gotham City has changed. It doesn't want your kind anymore. Now, look at me. I'm bigger than all of you put together. I am HOLIDAY!"
Yeah, but the best part of the character was that he was the lone serial killer. Maybe I'm too attached to the source material, but Alberto Falcone worked brilliantly when he was Holiday. This unseen lunatic lurking in the Gotham underworld. The fact that he was doing it all because Alberto never remembered his birthday was terrific. But no one would ever listen to that loser, no mobsters would ever follow his orders. He's a nothing, a nobody, a snivelling child. And
that is what made the character so great. It was a real emotional high to see Batman finally beat the crap out of the Holiday Killer. It wouldn't have meant as much if Alberto had a whole army of lackeys to help him.