The Splatoon 3 launch is going to be big, but my understanding is there isn’t quite the hype for it that there was for Animal Crossing.
With that said it’s still got the potential to have the second best launch of any Switch title and become the seventh Switch game to clear the 4 million copies sold in Japan barrier.
However I feel like the thing that’s going to stop Splatoon 3 from reaching the top eight slots of best selling games of all time where it can be compared against the second best selling Mario and Pokémon games is going to be the lack of legs from being a Switch evergreen title late in the systems life.
The other games in the top places of the Switch charts have had a chance to sell well above 3 million copies in Japan as evergreen titles. This is well after the initial sales rush.
Splatoon 3 gets about two years before the successor to the Switch appears and I feel like Switch game sales will start to noticeably decline after 2022 as sales of the system slow down in Japan.