Catwoman Purrrsday :: Animated Catwoman in Arkham City
A pleasant surprise: In Arkham City you can choose to play the challenge maps as the Batman: Animated version of Catwoman (as well as a Long Halloween version!) Apparently you can also change to these costumes in normal game play as you progress and unlock them. Neat!
Although the 'animated' style would presumably look and feel out of place in the gritty Arkham City world, this costume actually fits in rather nicely, and is a joy to see in action!