Glad you asked this question, magicmilner, as it's been one I've been wondering myself. As the Wii U is my only HD system, I've been interested in Darksiders II and Batman. From what I've gathered, they are every bit as good as their original console counterparts, but the addition of Wii U features isn't anything really game-changing.
I have a feeling that I'll definitely pick them both up when they inevitably drop in price later on. I'm also really craving a good FPS, and Black Ops II is apparently quite good, but I prefer something a little more simplified. I loved the Wii version of Goldeneye, so I'm hoping something with similar mechanics comes along soon!