About Batman: Arkham City

Appearances:
* Batman
* Catwoman
* Alfred
* Barbara Gordon (as Oracle)
* Tim Drake (as Robin)
* Penguin
* Joker
* Harley Quinn
* Two Face
* Solomon Grundy
* Victor Zsasz
* Mr. Freeze
* Bane
* Poison Ivy
* Hugo Strange
* Talia al Ghul
* Ra's al Ghul
* Calendar Man
* Killer Croc
* Black Mask
* Dead Shot
* Mad Hatter

and possibly some others