I don't think Nintendo will announce a new Zelda at E3...especially with their new approach of not unveiling games to the audiences too soon. If they unveil a Zelda then that would be awesome...but I don't think they will, because people will get excited and then it will be delayed until 2011 or 2012 (Mayan end of the world!).
Currently playing: Okami (Wii), The World Ends With You (DS), and Shenmue (Dreamcast)