The recent rash of "updated" and/or re-relases of classic games has had me thinking about what franchise's I'd like to see get the graphical/content update.
First one that comes readily to mind is Super Metroid - keep it 4d, but give it a graphics overhaul and more terrain.
With the FF4 and Bionic Commando updates I'm already pretty happy with some of the games have picked to go back, but what you like to see?