The games and below that I'll give explanaitons for each as to why I think they should be done.
On Launch Day.
- Legend of Zelda: Breath Of The Wild
- Pokemon
- Shin Megami Tensei
- Gamecube VC - Super Smash Bros Melee
- Luigi's Mansion 3 or Super Mario Galaxy 3
- Kingdom Hearts
- Final Fantasy Crystal Chronicles
Some time eventually in the NX lifetime
- Mario Kart 9
- Hyrule Warriors 2
- Animal Crossing
- Yo-Kai Watch
- Spla2oon
- Final Fantasy
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Considering the NX is more portable than it is WiiU2, these are the games I think the NX needs on console launch day.
Breath of the Wild (To capialise on the hype).
Something Pokemon (Since this is a portable console)
Shin Megami Tensei (for the Japanese fans and cause it's currently huge on 3DS)
Gamcecube VC (The first one should be Super Smash bros Melee). So many people would buy an NX just for that.
Something from the Mario IP. It's rumoured to be Luigi's Mansion 3, but I hope it's more like Super Mario Galaxy 3. SMG3 (if as good as SMG and SMG2) is a total console seller.
Appropriate 3rd party games. Not every COD clone and Super hero game out there like the WiiU got at launch. 3rd party games Nintendo fans would actually buy. Kingdom Hearts would be a perfect fit. As would a Final Fantasy Chrystal Chronicles game, but better than Crystal Bearers. Something more like the Gamecube game.
After the NX launch sometime the following games need to be released.
Mario Kart 9 (For obvious reasons)
Hyryle Warriors 2 (fix up all the flaws of the first game).
A proper Animal Crossing game. This the Nintendo game you play for 5 minutes a day, every day totally suited to portable consoles.
Yo-Kai Watch (It's huge in Japan)
Spla2oon. (ie Splatoon 2).
Final Fantasy the recent ones. Square Enix has hinted that some will be coming to the NX but most likely not at launch. This would be a simple port but help those casual Final Fantasy fans on the fence who don't also like Ninrendo but don't want to drop $400 on a PS4 for a Final Fantasy Game.