As long as the fight is always the center of the game it could be a good idea. My first thought went to a board with blue, red and green squares like in Mario Party. But instead of the minigames we have combats with special rules ("You can't use special attacks", "Gravity is reduced", "Speed is increased", "Life is costantly reducing unless you refill it"...). The head player can decide the special rules OR the stage, the second head player can decide what the first one didn't. When a special rule and a stage are selected their corrispective panels are removed. And once all the panels of the special rules or of the stages are removed they are all repristinated. Obviously there will be some special squares that will alter that ("Half of special rules panels are removed", "All the stage panels are repristinated", "You can choose special rules and stage"...). Well... You got the idea! I Think it could work for a whole afternoon as an alternative to a tournament.