On gametrailers.com during their E3 2009 invisible walls episode, they were talking about the new Wii zelda where they interviewed Shigeru Miyamoto about it. He said that if the motionplus controller is successful they will use the motionplus only controller exclusively for the next wii Zelda.
I would love to see a 1-to-1 motion of the master sword and bow... or even controlling the reins of Epona would be awesome.