Think of it as Team Fortress meets Batman: Arkham Asylum.
Gotham City Impostors, in development by Monolith Productions for the PC, Playstation Network and Xbox Live, will have players taking each other out as Batman- and Joker-themed criminals and vigilantes.

It's like you can't go five feet in DC Universe Online's Gotham City or Metropolis without seeing superheroes and super villains duking it out. I bet property values are way down.