I'd like to see what Nintendo and Shin'en could do for a new (purely vehicle-based) Starfox.

Partnering with Epic to make something might be interesting, but really they are already partnering with a development team known for especially bloody and M-rated games which is all I want because it'll be interesting. I can't think of another third party that would be more interesting for Nintendo to collaborate with.

Blizzard and Game Freak to make Pokemon console MMORPG

Sega and Nintendo to making Shining force/fire emblem

Nintendo and Sonic team to make Mario/Sonic platformer

Nintendo and Sonic team to make a new PSO for the wii

Nintendo and Sega for a nintendo/Sega all-star kart racing game.

Nintendo and Square for either a kingdom hearts game with nintendo characters or a new Super Mario RPG with the return of Geno

Nintendo and Capcom for a new side scrolling metroid game

Nintendo and Capcom for a Nintendo vs Capcom game.

Nintendo and Marvelous for a new Animal Crossing game.

Nintendo and Marvelous for the next pikimin game.

Nintendo and Level-5 for next Legend of Zelda game.

Nintendo and Level-5 for wii pokemon game.

PG games for Zelda (Okami anyone)

F5 for Starfox/Pilot Wings(assuming they get their act straight)

Square again for a Sequel to the SNES Super Mario RPG 2

Sega again for F zero

Yes great idea

Purely vehicle-based? Starfox Kart Racing!

Konami for Kid Icarus

Fuck yeah Landmasters.

Factor 5 for Starfox. Oh, wait...

Well, Rising Star Games for, err, well there are SO many franchises they could work on, Kirby, F-Zero, Starfox, a new Yoshi or Wario platformer, maybe even Mario Kart, though we don't need a new one yet. Pilotwings, maybe? Or Kid Icarus. A new Balloon Fight would be cool too. Wait I got it: PAPER MARIO. Though I can't see that happening. :p Oh well, weirder things have happened.

Zelda?

Anyway, they've been very friendly with Nintendo lately anyway, I mean, Muramasa, No More Heroes, Rune Factory, Harvest Moon, Bomberman, Baroque, Super Swing Golf, Little King's Story... The list goes on, I love them! :)