Arkham Asylum Imposters

Arkham City Imposters is an upcoming "sequel" to Monolith's Gotham City Imposters ( in the sense that it succeeds it but it has no true storyline to it). It is avilable on consoles and PlayStation Network and X-Box Live. It is available for the PlayStation 3, X-Box 360, Wii-U, and PlayStation Vita.

Plot
Many years into the future after Batman and many of his villains are presumed or are dead. There is a severe gang warfare issue on Arkham Island between two gangs; The Crocz (honoring Killer Croc and presiding mostly and moistly in the sewers where he was kept) and the Crowz (honoring Jonathan Crane and using mostly his famed fear gas as a weapon). Gotham City Police Department has gone lazy and doesn't care