Variety seems to think so
, and they claim it's part of a larger push to have all Justice League characters seen in some form of media or another ahead of a big-screen project featuring Batman, Superman, Wonder Woman, Green Lantern, Flash and Aquaman.
The Variety report suggests the Batman: Arkham team will actually produce a prequel of sorts, based around the Silver Age Comics' plot that sees Batman's first run-in with The Joker and his subsequent formation of the Justice League with Superman. The report also goes into detail surrounding other DC-related projects also in line to help build momentum for a Justice League movie, being produced as a major focus for Warner Bros in the wake of Marvel and Disney's success with The Avengers, which grossed 1.5 billion at the box office.
At last year's Spike TV Awards, however, Rocksteady produced a CG clip featuring Joker holding a manilla folder
with the title "Arkham World" sprawled across the front. The Joker also quipped that no one should have seen that. You can also overhear thugs in Arkham City referencing Arkham World, and many of the peripheral quests in Arkham City could be seen as stepping stones to the next "Arkham" entry in Rocksteady's massively successful Batman videogame romp.
There's also the case that any time spent working on a JL game is time spent away from Batman proper. What do you think? Would you like to see Rocksteady work on a Justice League game, or continue on with their gritty Batman: Arkham series?