Nintendo is really hard to predict, especially since they don't tend to announce games more than a year in advance like virtually every other publisher. I'm not even going to try to predict every single first-party release, because I don't feel like it. Some of these I feel pretty strongly about, some are just ideas. I'm leaving 2023 blank because I think Switch 2 will launch November 2022, March 2023, or November 2023. And final months of Nintendo first-party support are particularly hard to predict.
September 2020
Super Mario 35th Anniversary Collection
December 2020
Super Mario 3D World Port
March 2021
Breath of the Wild 2
April 2021
Paper Mario
August 2021
Pikmin 4
September 2021
Wind Waker HD & Twilight Princess HD Ports
October 2021
Super Mario Party 2
November 2021
Pokemon Gen IV Remakes
May 2022
Mario Golf
October 2022
Pokemon Gen IX
November 2022
Metroid Prime 4
Lifetime Sales Predictions
Switch: 151 million (was 73, then 96, then 113 million, then 125 million, then 144 million)
PS5: 115 million (was 105 million) Xbox Series S/X: 57 million (was 60 million, then 67 million)
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima