According to unnamed sources speaking to Kotaku
, the recently revealed Batman: Arkham Origins prequel to Rocksteady's Arkham Aslyum and Arkham City may have optional multiplayer. The tipster revealed that the multiplayer aspects will allow you to control "a member of Joker or Bane's gang while trying to take down Batman and Robin."
Those villains available for play include Killer Croc, Deadshot, Firefly, Black Mask, Deathstroke, and "some kind of Electroman character," with each one being customisable. No other details were revealed, however we'll be expecting more come E3 and beyond when we get closer to the release. Hopefully if multiplayer is added to the prominent single-player franchise it is done in a way that doesn't detract from the story.
Batman: Arkham Origins was revealed earlier this month
in an issue of GameInformer, where a 3DS and Vita prequel was also announced; Batman: Arkham Origins Blackgate. Both titles are expected on October 25, 2013 with Arkham Origins coming out for Wii U, PC, Xbox 360 and PlayStation 3.