New Handheld Zelda (a la Spirit Tracks) without stylus controls
Ice Climbers 3D (Oh yes, this would be so awesome. Not a port, but a new game)
Mario and Luigi 3D
From 3rd Parties:
Dragon Quest 3D
Final Fantasy VII, VIII, and IX 3D Up-res remakes!
Elite Beat Agents 3D (With licensed songs, can I dream?)
Sin and Punishment 3D (new game OR a high-res, high-poly remake of the 1st game!)