It has been reported that there are currently two new Zelda games that are in the works for Wii U. In addition to a brand new title, Nintendo has announced a HD remake for The Legend of Zelda: Wind Waker on Wii U. According to Satoru Iwata, this is planned for release by the fall.
You’ll be able to play the game on the GamePad or on the TV. Miiverse support is planned.