Bit of a talking point recently is Nintendo continuing to collaborate with other developers with its franchises.
Obviously the big one recently revealed is Shin Megami Tensei X Fire Emblem, with Nintendo and Intelligent Systems teaming up with Atlus. Other collabs with Nintendo in the past include Tecmo Koei for Pokémon Conquest, Team Ninja for Metroid: Other M and SEGA/Amusement Vision for F-Zero GX. Nintendo also has a very good relationship with Namco, which developed Donkey Konga and Star Fox Assault, and is also working on Smash Bros at the moment.
Nintendo is looking to continue more collabs in the future, so what would you like to see? It could be a crossover of two franchises, or simply wishing for a particular developer to work with Nintendo on a new game in a series.
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I'd really like to see Silicon Studio work on a new 2D Zelda. Their job with 3D Dot Game Heroes was such a worthy throwback to NES RPG adventures and was a real challenge to complete, both in terms of puzzles and enemies. It was an incredibly creative and humorous game, too, so I would love to see that brought into Zelda. Really would love to have it made in HD for Wii U. Anyone that's seen 3D Dot on PS3 would agree how sublime it looks. Equally so, stereoscopic 3D would work wonderfully for it so 3DS would be a worthy option, also.
Perhaps a fan service one for myself would be Mario RPG X Final Fantasy. A collab between Intelligent Systems and Square Enix. Perhaps have Mario as the main character but throw him into a fantasy world where he can recruit some faces from the FF series as allies. I think it could work in either the Paper Mario format or a more Super Mario RPG format. Paper would be good since they're already partway there with the Theatrhythm models - just need to touch them up a bit for expressions and remove rosy cheeks. But could go down the completely original route for a more 3D style, like Mario RPG.
Whether it'd come together or not without being ridiculous, I don't know, so failing that, an original Nintendo X Square Enix RPG collab is much needed. Perhaps a real strong Wii U HD exclusive effort. I know it's not possible with all that Square has going on right now; it's more of a pipeline dream. But imagining a Nintendo X SE RPG in that vein would be incredible.