That's awesome hahaha
I had a sort of similar idea, (i.e. bringing the actual gameplay of an IP into the game.) for Dr. Don and Dr. Dan from Point Blank. One of their supers (maybe their level 3, although it'd probably be pretty escapable) could be like a lightgun at the bottom of the screen with a target reticule, and the characters would all duck and rise behind cover, or run between cover, as you tried to shoot them. Each successful shot would grant a kill. Of course there'd be a time limit, maybe 5 -10 seconds? I suppose to make it fun for everyone, there'd be a control scheme for all the other players too.