I'd like to see more level styles to choose from other than just SMB, SMB3, SMW, NSMBU, and SM3DW. Like, maybe they could add SM64, Super Mario Galaxy, Super Mario 3D Land, and Super Mario Odyssey as 2.5D level styles just like SM3DW is. Something I think would be really cool too is if they added a Paper Mario style option. Super Mario Bros. 2, Super Mario Land, and Yoshi's Island styles would be nice too, but I think at that point people might get overwhelmed by the many different choices they'd have. Maybe they could combine elements of similar games? Like say they have New Super Mario Bros. as a style, so they include elements of New Super Mario Bros. DS, Wii, 2, and U/Deluxe under the same option.