Pokemon Scarlet and Violet might (probably will) end up outselling Sword and Shield. Which I'm pretty sure is going to be the first time in the series history that the second Pokemon generation release on a given system sells more than the first. That is, Gold/Silver sold less than Red/Blue, Black/White sold less than Diamond/Pearl, and Sun/Moon sold less than X/Y (albeit barely).
Kinda crazy considering the problems S/V launched with (and still hasnt been properly patched)