They should definitely bring back Raven Blade on NX. Their consoles have a gaping hole where WRPGs are concerned, Raven Blade could fill such a hole.

2D Mario with a big budget behind it
Open World 3D Mario (or something that's closer to open world at least)
More Zeldas like Breath of the Wild (I like that direction)
Wii Sports 2
Quirky but mass-market approved stuff like Rhythm Heaven

In general, the direction Nintendo took with software on the DS was what I liked the most. A good mix of pick-up and play games and heavy hitters. Lots of software aimed at the mass market.

One way the industry is overshooting customers right now is with play-time. Games are expensive and thus have to be long to be considered worth the price but there's a huge number of people like me who can't invest too much time into gaming. 5-10 hours of playtime (at a lower price) is perfect for me. I'm actively looking for shorter games.

Castelvania: Breath of the Darkness

I want a sequel to Metroid Fusion. And it has to be 2D. I don't understad why Prime fans are feeling so hurt and deserving of a new Prime game, when we 2D fans haven't had a mainline Metroid game to play since 2004 (zero wasn't even a sequel). That's what I call patience.

I want a Princess Peach turned based RPG where you can change her in and out of sultry outfits while being equipped with phallic like weapons.

This either means that people tried it out in the first place because it's free, or it's actually much better than you give it credit for, not because it's a co-op game.

I was thinking about the NX console not the handheld. The wii u game looks incredible, the artstyle is gorgeous but I´m not a big fan of the controls :(

Planet Robobot looks perfect! I need to buy it once I finish my backlog :P

I'd like more large scale Nintendo games and I'm hoping that Nintendo will reuse and modify the BotW engine to greatly cut down on the development cycles of such games.

As someone who adores the Prime games, I actually don't want another one. As great as they were, I'd rather they did something new with the series. The story of Metroid Prime and Phazon is over, it doesn't need to be dragged out further. Similarly, while I love Retro Studios and think their work on the Prime trilogy was amazing, I'd rather they do something fresh and new instead of another Metroid.

4 player online/offline co-op cover based 3rd person shooter featuring the star fox team with an emphasis on vehicles. Like a mix of Army of Two with Halo or Starhawk.
4 player online co-op game featuring the secondary characters of zelda in behind the scene stories. 3d Zelda gameplay including multi-player puzzles.
Survival horror on par with eternal darkness.
3rd person metroid game. Like other M but with obvious improvements.
3rd person Kid icarus with a zelda sized scope.
3rd person ice climbers game with character switching with a mario galaxy sized scope.
3d donkey kong comparable to banjo kazooie.
of course the regulars like smash mario kart 2d mario and 2d kirby. I don't think the 2d games should be 60$ anymore though. more like 40.
Pikmin 4
New awesome ip and 3rd party exclusives
Games similar to the operation rainfall line.