Zippy6 on 12 December 2021
It will be interesting to see how much it picks up in January, but I think the real thing it's going to come down to is legs, which isn't usual for Pokemon games because they usually sell very fast at the beginning and have very little legs. (though SW/SH has had much better legs than most Pokemon games)
I think the big thing is going to be week 2 drop, Legends Arceus needs good reception and word of mouth to propel it from a 10m+ seller to a potential 15-20m+ seller. I don't think it'll necessarily have the best first week but if it's received well I can see it selling great when it comes to the distance.
