Rocksteady Studios has released a new update for Batman: Arkham Knight that unlocks a character selection tool for the Combat AR mode. This means you get to play with the other heroes (and some villains) from Gotham, in these combat challenges. The heroes and villains available for selection in addition to Batman are: Nightwing, Robin, Catwoman, Red Hood, Batgirl, Harley Quinn and Azrael. The update is free, and does not require the season pass.