I never picked up Mario Maker 1 for the Wii U, it was either because of the lack of multiplayer or I wanted it more in a handheld (but then it came to 3DS and wasn't that great so i didn't get that either).
So I'm pretty excited about this. Before I recently replayed Mario 1, i haven't played a 2D Mario game in years and years. The first few levels of NSMB2 was probably the last time, with NSMB1 being the last time before that.
I didn't mind the "New" SMB look and feel in the forest DS game, mainly because there hadn't been a 2D Mario game in so long, but after that I already had my fill of that art and music style so I never got NSMB Wii, Wii U, or the Luigi expansion.
I know it's an option in this game, but having the other artstyles and music in this game will make it much more bearable.
I think local co-op on one Switch was official announced at some point (maybe it was that GameExplain video, I forget), but if it IS in the game it'll make it perfect to play my fiancé. She occasionally wants to play games together, bit lost modern games are too complicated for her.