The original sold 13.2 million across multiple platforms - which is a relatively high number for a license title. NSMB sold 30 million on DS, a port of NSMBU sold 15 million copies on Switch, New Super Mario Bros Wii sold 30.3 million.
Factor in that Switch already has a substantial lead over PS5’s likely maximum sales.
Factor in that Marvel popularity outside of gaming is on a steep decline while Mario popularity is on the upswing.
I’d say anything less than double the sales for NSMB World will be surprising.
I describe myself as a little dose of toxic masculinity.