GTA V has sold insane numbers on seventh and eighth generation consoles. Despite that, we'll almost surely get GTA 6 on PS5 and XSX. I do think Animal Crossing: New Horizons can outsell the ninth generation versions of GTA V. The upcoming versions of GTA V will probably sell 20-25 combined, and New Horizons is already past 22 million.
Lifetime Sales Predictions
Switch: 125 million (was 73, then 96, then 113 million)
PS5: 105 million Xbox Series S/X: 60 million
PS4: 122 mil (was 100 then 130 million) Xbox One: 50 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