Eiji Aonuma, producer for many of the Legend of Zelda titles, has revealed to Game Informer that the art style and the story for Skyward Sword will be a one time thing and with Zelda Wii U coming in the future, he made it known that Zelda Wii U would be completely different from Skyward Sword itself.
“With Wind Waker, the graphics were suited to handheld gaming. Also the game ended with Link embarking on a journey, so it left open the possibility of what comes after the game. With Skyward Sword, positioning it as the first Zelda game means everything else connects to it and comes after it. It becomes a little bit difficult to do something else within that world and certainly much more difficult to do something that comes before it.” -Eiji Aonuma