Anybody with Ninja in their name. Anybody with Spartan in their name. Anybody with a name that is so obvious that they are trying to pass themselves off as "MLG" because it is so... I don't know, impersonal? That might not be the right word.
Its really the only mode I like in H4 and I've only had this since Dec. Usually play a couple games of Gball the head back to Gotham City Impostors or a solo game. Of course my teammates are usually blind deaf and dumb on Gball that like to get the ball and run directly into the 4 enemy teammates