What are these Wii U features like?
Before the release of Injustice: Gods Among Us on the Wii U, a lot was up in the air about the game's Wii U features. After getting my hands on the final version, I can assuage some of those fears, but unfortunately, some others creep up for this otherwise impressive fighting game from the guys who made Mortal Kombat.
On Wii U, the game is feature complete with other versions for what is on the disc. It has every character and every unlockable. You can also use Off-TV Play very easily. If you're using the GamePad while playing on the TV, you can have moves displayed on the GamePad. That's not usable, though, as you still need to take your eyes away from the action to view the moves anyway. The font is too small to be useful at a quick glance.
Online play was workable. I ran into a few matches with bouts of lag, but nothing that ruined the experience. However, you can only set up battles through matchmaking. For some reason, you have no option to set up a private match, which is possible in the other versions from what I have heard.

While there is no season pass available, there will be DLC for this game. A lot of the pre-order bonuses and other associated offers, such as the alternate costumes in the iOS version, aren't compatible with the Wii U version, though. Since no DLC is available right now, I can't vouch for the experience of accessing the DLC, or if the Wii U will even get the same love that the other versions will.
As for the actual game content, I loved my sordid night with Injustice. The story mode seems rather short, but it weaves an interesting Elseworlds tale that makes use of a lot of different DC characters. The S.T.A.R. Labs missions are also a lot of fun, as they give you varied objectives for each match. While my time with the game has reminded me how much I suck at combos, Injustice appears to be friendly enough to rookies and contain enough depth to be interesting to genre veterans.
We'll have a full review of Injustice on Wii U in the next week or so, but unless Off-TV play is an absolute deal breaker for you, it seems like the 360 and PS3 versions are the ones to get if you have the option.