Nintendo takes nostalgic and new young gamers for which these games are brand new.
Platformers like Mario have a large casual appeal plus these have the aura of being some of the best games ever made. They'll sell and keep selling a lot until the next 3D Mario is going to be released. This could take a while.
I think it will easily sell 12 million plus in its first year.
Yotei is a sequel that looks like a true sequel. That usually does not sell as well as the first one. Simply because being less surprising and refreshing. I think 5 million plus in its first year.








