Looks like Crytek has made the decision to not have Crysis 3 release on the Wii U. Unfortunately it comes down to business at the end of the day and Crytek just doesn't see it happening. The CEO of Crytek, Cevat Yerli would love to see it on the Wii U regardless, stating below,
"I’d love to see it on Wii U," he claimed, "but what I love to see and what gets done at the end of the day are two different things. Even so, I could initiate it but someone has to sell it, right? If that business decision doesn't make sense, or seems to not make sense for them, it's … not possible for us to make it. We can’t publish ourselves, and that’s the bottom line."