I think 2019 will be looking something like this:
January - New Super Mario Bros. U Deluxe, Travis Strikes Again: No More Heroes
February - Town and Smash DLC 1
March - Yoshi's Crafted World
April - Wii or WiiU port
May - Nintendo Labo and Smash DLC 2
June - Fire Emblem: Three Houses
July - Daemon X Machina
August - Shin Megami Tensei V and Wii/WiiU port
September - Luigi's Mansion 3 and new Nintendo Labo
October - unannounced game and Smash DLC 3
November - Pokémon Gen 8
December - Animal Crossing
+ few third party exclusives (mostly from Japan)
Bayonetta 3 and Metroid Prime 4 will arive in 2020.