Yeah, yeah, I see your point. I went and deleted it. Perhaps some different ideas are in order. After all, that one was for a completely different sort of game. XD
Alright, here's a different idea. A platformer-style fighter, with a metroidvania-style single-player mode (just one map, though). Each member of the team can design their own character for playable use, and perhaps more from the community. Sound fair?
And the plot? "LOL LET'S BEAT THE SNOT OUT OF EACH OTHER AND EVERYTHING ELSE, K?"