I defenately agree using established characters(either guests like batman, the adams, etc or just general cartoon characters) are the way to go. As has been pointed out it will simplify the process of choosing a character. Rules wise I'm thinking of trying to adapt the Toon rules as they are a fairly logical pick. Either using a dice system like the old SW D6 rpg or some thing with playing cards(I really don't care for the rock/papper scizors bit). I also know a couple people I can probably sweet talk(more like bully) into helping me run it.