This show would definitely be interesting.. I bet HBO would allow it even though I don't think that Chase would actually do another show. With The Sopranos being over and now no chance of a movie with Gandolfini's death, and Boardwalk Empire ending, they're probably looking for something new in the crime world. Plus, they've done modern day and 1920s/30s era, old west and Game of Thrones times, 60s and 70s would definitely be a nice change. (Also, I agree they would have to start with a whole new cast, not saying Johnny Boy's actor was bad, just not good enough for the top role.)