Like I said before, the best thing would be a Mob Anthology series on HBO or Netflix. Where every episode has a different story and lasts 90 minutes or so. Episode 1 for example could be about the first Colombo war, episode 2 about the Pizza Connection and episode 3 about the rise and fall of Joey Massino. Every episode is a story by itself and has a definitive ending, which keeps it interesting. This way you can also present a lot of the more unknown stories, instead of rehashing the Gotti story or the Donnie Brasco case for the umpteenth time. A season would have 13 episodes, which would basically be 13 movies.

If they'd put great writers like David Chase, George Pelecanos or Vince Gilligan on it and a cast of superb character actors, a thing like this would be a smash hit because everybody loves a good Mob story. Personally I'd be the most interested in a story about Carlos Marcello.