I think Star Fox could be as popular as some of Nintendo's "B-tier" franchises like Metroid, Kirby, Fire Emblem, etc. if it was handled correctly with a high quality new installment.
Diddy Kong Racing is another franchise that Nintendo has that they're probably sleeping on too. A new DKR for 3DS I can probably see happening for 2014 or 2015.
Wave Race should be given another go on Wii U IMO (imagine the water physics!). No one's really making that type of game anymore.
F-Zero and Advance Wars should return but as digital download titles only. They don't have the steam to hack it as retail titles, but could find a decent sized audience as digital releases. Lets say $29.99 for a new F-Zero with Wii-level assets, 720p resolution, 30 player online, 8 new tracks, 8 "classic" tracks, 60 fps, with future downloadable tracks.
I'd be down for that.
