I don't know anything about the 'Wii U' but I believe it's the next iteration of Nintendo's Wii (I'm at least THAT smart.)
Anyways, Wii U's version of Arkham City will include all the DLC from previous versions as well as exclusive armored-up versions of Batman and Catwoman. Keen.
"Batman: Arkham City Armored Edition contains all of the content from Batman: Arkham City,
including all available downloadable content, and introduces Battle
Armored Tech (B.A.T.) Mode and the new Armored Suits for both Batman and
Catwoman. Fans can become the Dark Knight like never before with the
upgraded battle suit that gives players an additional power-up by
allowing them to build kinetic energy during combat. When activated,
players enter B.A.T. mode and dole out more damage than previously
The Wii U GamePad provides instant access to the wrist-mounted
Batcomputer throughout the game, allowing players to use the touch
screen to seamlessly select objectives, choose their gadget, track
forensic evidence, upgrade their gear, detonate explosive gel, and more,
all while remaining immersed in the action. Additionally, all gadgets
have been reimagined to utilize the power of the GamePad, offering an
unprecedented level of accuracy when using the Batarang and scanning for
The game is scheduled for release holiday 2012"
Hmm, that Wii U Gamepad sounds pretty awesome!