Leaked Concept Art, Info Suggests That There Was an In-Development Sequel to 'Batman: Arkham Knight'

Batman: Arkham Knight capped off the Arkham series in style (apart from the PC port, but that’s another story). However, according to a recent leak of information on 4chan (yes, I know) reveals that the game was due to have a sequel. Again, take this one with that shaker of salt, especially given the source. […]