Early Zelda Wii Details
 

Pretty much what I thought, Nintendo hasn't finalized a concept for the game yet.

Miyamoto said he wanted to show it, but aren't 100% sure if it will be exclusively Motion Plus. He does say to check out the archery/swordplay in Wii Sports Resorts for hints of next Zelda.

Also Link is apparently a bit more grown up, and some chick in a blue robe (Im gonna assume Zelda, but you never know)

http://wii.ign.com/articles/989/989996p1.html
Most likely announced at e3 next year, which makes sense with two Mario games and a Metroid this year.