Focusing on just Nintendo-developed/published games:
- Q1 2017 - Legend of Zelda: Breath of the Wild (EPD), Mii Game (EPD)
- Q2 2017 - Xenoblade HD (Tantalus)
- Q3 2017 - 3D Super Mario (EPD), Pikmin 4 (EPD)
- Q4 2017 - Mario Kart 9 (EPD), New IP (Retro Studios)
- Q1 2018 - Mario Party 11 (ND Cube), Zelda Spinoff (EPD)
- Q2 2018 - Super Mario Maker 2 (EPD), Mario Golf/Tennis (Camelot)
- Q3 2018 - Hyrule Warriors (Omega Force), Kirby/Yoshi/Wario Platformer (???)
- Q4 2018 - Splatoon 2 (EPD), Luigi's Mansion 3 (Next Level)
Basically, I feel the launch should focus on Zelda and a major casual game that uses Miis. Miitomo is a thing that should be tied into the NX experience, and I think the first major casual game on the platform should emphasize this.
I feel that a few months of software drought after launch isn't the worst thing possible. After all, we can't scare away too many third parties, and those next-gen games take time to make. This is why updated releases of old games with improved visuals are useful. It was useful for the 3DS using Ocarina of Time, and would work well here provided the post-launch gap is shorter.
I suspect Pikmin 4 is fairly close to release, based on prior comments from Nintendo, and that the next 3D Mario will come sooner rather than later, based on Miyamoto's recent comments. Maybe it will be in Q4 instead, but it could be shown in early 2017 and released during the summer. This will overlap with the release period for Mario Kart 9, the first big online game for the NX, and whatever Retro is working on. This way, we have Mario Kart, 3D Mario, and Zelda in less than a year.
2018 can start with more minor titles. The upcoming Mario Party for 3DS is likely an experiment for MP11, and three years is enough of a wait for that to be made. Camelot would also have time to make a proper Mario Sports game, and a Zelda spinoff can be made using Breath of the Wild's assets, a la Link's Crossbow Training. The main star of Q1/Q2 2018 would be Super Mario Maker 2, which will likely replace the "New" series for the near future on consoles.
The second half of 2018 will feature some larger games, including a second Splatoon, the obligatory 2D platformer, Luigi's Mansion 3, and maybe a third party collaboration. With this, the only big missing series in terms of sales AND acclaim would be Super Smash Bros, which I feel should wait until 2019 or so to distance itself from the current iterations.
Also, in my dream world, the NX is getting games like Mass Effect Andromeda, Injustice 2, Dragon Quest 11, Kingdom Hearts 3, and so on.
