This late into the life of Switch, Zelda: TOK is the only upcoming title guaranteed to be a 15-million and up seller. A possible Gen 5 Remake of Pokemon is guaranteed to hit 10 million and might get up to 15 million or more. Let me predict the top 10 with final numbers.
1. Mario Kart 8 Deluxe - 58.38 million
2. Animal Crossing: New Horizons - 51.25 million
3. Super Smash Bros. Ultimate - 35.64 million
4. Zelda: Breath of the Wild - 34.33 million
5. Super Mario Odyssey - 32.10 million
6. Pokemon: Sword and Shield - 31.50 million
7. Pokemon: Scarlet and Violet - 30.08 million
8. Super Mario Party - 21.08 million
9. Zelda: Tears of the Kingdom - 18.86 million
10. New Super Mario Bros. U Deluxe - 18.42 million
Ring Fit Adventure doesn't have the legs (I agree with @Kakadu18 on that, at least) to stay in the top 10. I also don't see Let's Go having enough legs either.
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
