This solo mod looks like if Retro Studios were in charge of NSMB Wii's development. It even has the silhouette stages from Donkey Kong Country Returns. And the backgrounds are in 3D. https://nintendoup.com/what-if-retro-studios-made-new-super-mario-bros-wii-this-glorious-mod-is-your-answer/
Video by BeyondSMBWII: https://www.youtube.com/watch?v=qTvIwJRZB_U
by Head_Example3763