Game idea:
Sports game about pretty much any sport where each team has their own stadium. Rather than a tournament you conquer stadiums of your rivals, taking over the map as you win matches. Of course since you're an official club you have to keep your finances in order and running a couple dozen (empty) stadiums isn't cheap. Money comes from winning stuff, so a large empire can get bankrupted simply by losing a few times. Winner would be the last team standing.