Sure, I always kind of like playing the rival, but with a concept like Scott Pilgrim, I can have some real fun with it. I'll post another CS later today.
Also, how about "Con-Compadres" where it's basically people who constantly go to Conventions (Comic Con, Fan Expo, ect)
Or, perhaps a group who's more into films and television rather then Video Games. They could be called the "Green Screens"
Or perhaps they're just another group, but instead of talking about good games, they play horrible video games and believe that they are awesome (kind of the opposite of our group). They could be called "Gamepad" and somehow, a few of the characters could have possible ties with the other characters, such as they shared the same girlfriend at one time, they hated each other from high school, or maybe the Joystick character needs to fight his/her Seven Evil Exes (I' joking, but with this world, who knows what stuff we might reference :P)
Well, I'll let somebody else take the floor for now. I think I've made my point.