While I'm not really a fan of the electricity effects, the sticks are BAD *SS.
If you're a fan of Challenge Mode, I highly recommend the Nightwing DLC. IMO, his fighting style actually blows away both Batman and Catwoman.
Wish they would've included a moves list or something though. I'm not sure if he has a X+Y weapon break, or any other combo/takedown other than Y+B.