1) One character per participant.
2) One character per franchise.
3) Battle Royal, last one standing progresses to the next round.
4) If someone dies, their franchise can have another person taken from it.
5) Feel free to loot the dead, but the winner from the last round gets it all at the end.
6) Your character should be roughly equal to the others. Sure, it would be fun for you to play as Superman when everyone else is just humans or peak-level humans, but it ruins it for the rest of us.
7) Game ends when someone wins three rounds in a row.
Round 1 I'll play as the Bride from Kill Bill.