Although billed as Nintendo's next-gen console, the Wii U doesn't look to be quite next-gen enough.
Crysis 3 will still be released for the 360 and the PS3, but according to Crytek studios general manager, Nick Button-Brown, the game will not be ported to the Wii U. The announcement was made via twitter, "Just to answer speculation, we are not currently working on a Wii U version of Crysis 3."
It looks like the Wii U is on par with current gen consoles and wouldn't' be able to handle the CryEngine 3, the ultra fast, high end game rendering engine that runs Crysis 3.
Crysis 3 is slated for an early first quarter release in 2013 for the PS3 and the Xbox 360.