There's been conflicting information about Crytek's Wii U ambitions for a while, particularly in regards to Crysis 3. The latest word is no: at this time, there aren't any plans to put a version of Crysis 3 on Wii U.
Over the last couple of months we've heard that, despite CryEngine 3 running "beautifully" on Wii U, there was no chance of Crysis 3 coming to the system. This stance seemed to brighten slightly when a port was said to be "a possibility", but we're now back to a negative response.
Crytek general manager Nick Button-Brown posted on Twitter that Crysis 3 is "not currently" coming to Wii U.
Just to answer the speculation, we are not currently working on a wiiU [sic] version of #Crysis3.
There's still room in that statement to wish for a version of the game on the console in the future, but for now the answer seems quite clear: there won't be a version of Crysis 3 on Wii U. Best not to keep those hopes up.