The Wii U GamePad isn't the only controller supported in Zelda: Wind Waker HD. If players like, they can opt to use the Pro.Controller
We also have a bit of news regarding HD’s download size. The digital eShop release will take up roughly 2.6GB of space. You’ll also need at least 31MB for save data, and like the original, three save slots are offered.Wind Waker
Last but not least, PCM 5.1ch and 1080p functionality are supported in Zelda: Wind Waker HD.
Article: http://nintendoeverything.com/zelda-wind-waker-hd-supports-pro-controller-file-size-revealed/
Nintendo Japan Source: http://www.nintendo.co.jp/wiiu/bczj/detail/index.html
Linearsurround sound