DBZ one would be cool. Maybe somebody has an ability that collects dragon balls and every time they have 7 they can wish back somebody from the dead? Great Ape Saiyan that turns berserk given a circumstance. Captain Ginyu as a mafia member that can "switch bodies" with somebody, making that person a mafia member with no added abilities, and taking that player's role (or becoming a powerless civilian, to avoid it being too broken) would be really interesting. And THAT one could be one that isn't announced, so at any point any player can be like "oh yeah I'm captain ginyu and I just traded bodies with dave we should kill dave" and like do you believe that person??? do you trust them???? now captain ginyu is a good guy that knows the identity of one mafia member but does anybody believe him? shit could be good.
I feel like DBZ mafia would have a lot of powers that get better each round, like next stages of super saiyan and stuff.