That was neat. Tons of weird new ideas, weird new enemies, weird new powerups. If they can combine that with some excellent level design (which even the NSMB games had), we should get something truly great. Personally, I hope that there's still something there that elevates this from "great" to "special." Remember the first time playing SMB3 and getting to the Kuribo shoe level? Or playing and all of a sudden the hammer bros on the map turned into a white ship filled with coins and you were all "what the WHAT?" Or playing SMW and finding star levels and thinking this was cool and all but weird and then you completed them and got transported to a black screen with super crazy levels named Tubulur and stuff and you were all "what the WHAT?" again? Yeah, I'm hoping for that level of creativity. Throw some secrets, REAL secrets into the game that nobody expects. Throw some moments in there that just defy all expectations (hopefully the Wonder effect can do some of that). SMB3 has been my favorite platformer for 30 years. Let's see if it can get dethroned.
But if not, well, I'll probably still be happy with it.