The Wii U could probably handle Crysis 3, but EA doesn't see enough value in porting it.
When Nintendo introduced the Wii U, it did so with a promise; a promise that the company was going to put more of a focus on "core" gaming. Whether or not the Wii U lives up to that guarantee is up for debate, but as far as EA is concerned, it seems that the new console just isn't a good fit for Crysis 3.
CEO of Crysis developer Crytek, Cevat Yerli, told Digital Spy that a Wii U release just doesn't make sense for EA at this time. "There has been discussions between Nintendo and EA and Crytek, but the bottom line is that there is that there's not enough business drive in it," he explains. "It's a purely business decision. I'd love to see it on Wii U, 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?"
Yerli doesn't mention any technical hurdles that might exist in porting the title Nintendo's console, and since the Wii U is at least comparable in power to the Xbox 360 and PS3, the game could be published on the new platform. Unfortunately, it seems as though the Wii U's perceived install base just doesn't strike the right chord with EA.
Admittedly, this decision isn't really surprising, and I imagine most FPS fans weren't holding their breath for a "Crysis U" anyway. Still, we might be seeing the early symptoms of a Wii hangover for Nintendo, with publishers remaining hesitant to move traditionally hardcore multiplatform titles to the more-than-capable Wii U after ignoring its predecessor for so many years.