Games already released that will cross 10m:
Super Mario Maker (probably)
Mario 3D World + Bowser's Fury
Mario Party Superstars
That brings the total to 55. Games soon to be released:
BDSP
Arceus
BotW2
Splatoon 3
Next mainline Pokemon
That brings the total to 60. Then the big mystery is how many unannounced games are left that will cross the 10m mark. I am going to guess 3. There are a whole lot of possibilities, but Nintendo will only choose some of them (Tomodachi, popular port(s), another Mario Party, Mario Kart 9, 2D Mario, Wii Sports 3, RFA2, etc...).
So, I'm going to guess 63.
curl-6 bet me that PS5 + X|S sales would reach 56m before year end 2023 and he was right.
My Bet With curl-6
My Threads:
Master Thread, Game of the Year/Decade
Switch Will Be #1 All Time
Zelda Will Outsell Mario (Achieved)
How Much Will MH Rise sell?
My Bet With Metallox