Confirmed:
- Dragon Quest XI
- Dragon Quest Builders
- Fire Emblem
- Kirby: Star Allies
- Lost Sphear
- Project Octopath Traveler
- Travis Strikes Again: No More Heroes
- Wolfenstein II: The New Colossus
- Yoshi
- tons of indie games
My predictions:
- 2D Mario
- Animal Crossing
- Super Smash Bros. for Switch (maybe DX version of SSB 4)
- Hyrule Warriors DX
- 2D Zelda
- Retro Studios new IP
- Pikmin 4
- Shin Megami Tensei
- Resident Evil 7
- The Evil Within 2
- New Call of Duty or ports of old games
- Sports games
Maybe some of these games will be seen in early 2019.
The first year of Switch will be better than the second one (but there will be no reason to complain).