I've decided to go with a generalized Yakuza theme in the future, sort of a mixture of Shaun Sans Pants' old Yakuza theme in a purist's form, Chicago MUSH's Mafia as a rival faction, and MotM's Interpol (as viewed by their player Daniel) as the heroic faction. I'm going with a loosely Bladerunner technology level, so we have the boomtubes, 'Strange Days' drugs, Rumsfeldian warfare for the Shadowrun military corporate ethic, and the 25 cities on top of a very simple one-room-per-continent grid.
I'm taking my project 'Neo-Tokyo Nights', which I've determined is Daikatana, and making a much more simpler 'Katana', without releasing Daikatana and ruining myself.
I'm calling it 'Yakuza MUSH', and it will essentially be a corporate criminal versus street mobster versus mercenary cop game, which sounds very boring, except you'll have a neat combat system I've designed where you build experience very simply and advance rapidly at first, but slowly upwards, with more experienced players having a superb advantage (it's just harder to get to the higher levels).
The combat system is really the centerpiece, the entire MUSH is a showpiece for the combat system.