Right now I'm guessing in the 25-50m range. I am still watching to tell exactly what effect Gamepass will have on X|S sales. My guess is that console sales will actually go down this generation. If we are talking Gamepass subscriptions though I think it will be 50m+ (probably significantly above that).
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