Already announced:
TMS #FE
Animal Crossing NH
Xenoblade DE
My guesses:
New 2D Mario (not with the new super mario style)
2D Metroid (the SM remake rumored in the other thread)
New Paper Mario (mix of TTYD and Color Splash)
Brain Training
Smash fighter pass season 2
More DLC for SMM2, FE, Ring Fit Adventure and Tetris 99
GB-GBC-GBA coming to the Switch Online
From third parties:
SMT V
Bayonetta 3
Octopath Traveller sequel or spiritual sequel
Proud to be the first cool Nintendo fan ever
Number ONE Zelda fan in the Universe
Prediction: No Zelda HD for Wii U, quietly moved to the succesor
Predictions for Nintendo NX and Mobile