I'd be very surprised if they didn't have at least a new 3D Mario or Zelda game to show off at E3. I don't think they would have much trouble getting the media to show Mario or Zelda in HD either. Past that though I think they need to announce something like Star Fox or F-Zero and a few mor 3rd party exclusives (and actually show something of Bayonetta 2).|
Pretty much the same thing goes for the 3DS actually, though with the new Pkoemon games that should do fine this christmas.
XBL/ PSN/ Steam/ NNID - MatMan562