Asriel on 21 August 2018
I'd start with New Super Mario Bros All Stars as a way of filling out Switch's library and leaving that series behind (rather than just porting U and Luigi U), then doing what a lot of people are suggesting here. The basic level design and controls are fine, but a bolder take on the aesthetics, music and selection/variety of content is needed; 'New Super Mario World' would be good, if they go ahead with those changes.
