The funny thing about this latest Batman storyline is that Batman himself is the least important player. The Dark Knight spent the bulk of issue #48 as a silent, passive partner to a scene-stealing Joker. This time around, Batman has almost no presence at all, with Tom King and Mikel Janin focusing all of their attention on the dynamic between Joker and Catwoman. And it quickly becomes apparent that a comic titled “Batman” doesn’t actually need Batman to thrive.
Source: IGN.com Joker and Catwoman Make a Great Team