Well it seems that Zelda Wii will definitely be shown (and from what Gametrailers.com has said on their E3 section, gameplay will be shown as well).
A quote from GT's E3 schedule page:
"Nintendo is notorious for telling us to wait until E3, and for better or worse, it always have some surprise up its sleeves. However, what we do know is juicy enough. The next Zelda will be make its full debut with MotionPlus swordplay."
http://www.gametrailers.com/e3/
A quote from GT's E3 schedule page:
"Nintendo is notorious for telling us to wait until E3, and for better or worse, it always have some surprise up its sleeves. However, what we do know is juicy enough. The next Zelda will be make its full debut with MotionPlus swordplay."
http://www.gametrailers.com/e3/