http://mynintendonews.com/2012/07/05/wii-u-will-support-headsets-from-day-one/
Wii U will support headsets from DAY ONE!!
Lygo International, manufacturers of gaming headsets, have confirmed that they are “planning a line of headsets slated to tie in with the Wii U launch.” The Wii U GamePad includes built-in speakers and an embedded microphone for online communication but separate headsets are a welcome addition, especially for gamers who prefer using the Wii U Pro Controller.
note: the image is not of a Wii U headset