Bullshit. The Batman Begins video game was pretty swell. And you've already got an open-world Batman game to base your work off of (Arkham City). I want my Bane fight QTEs damn it.
But can't the Arkham series be like the Spider-Man video game series, where you've got the video game universe (i.e. Shattered Dimenions, Edge of Time) and the movie tie in by the same studio (The Amazing Spider-Man Video Game). Of course, splitting up the teams may have had a damper on the quality seeing as how none of these games reach the caliber of Arkham City, but still. I think Rocksteady could have pulled it off. Then again, I know nothing about video game development and am probably underestimating the time and work costs it would take to make the game, but screw it all. I'm a dreamer.