The problem I see with Super Mario Maker is that...level quality. I'm not going to lie, it pisses me off that the top 20 is filled with autoscrollers.
And, everything else? Mostly an exercise in star-bait. Hard, unfair levels, or levels that can be broken with a Lakitu, or just plain bad level design.
And the odd level that's actually good? Good luck finding it.
And that is why there will always be 2D Mario games
As for everything else, nope. Smash can still have its base mechanics refined and Sakurai can stop working on the damn game - passing the baton to someone else, for once.
Mario Kart? There's a dedicated EAD Mario Kart team. Do you seriously want them to work on F-Zero after this? Mind you, DLC expansions generally take less work than your base game - Captain Toad took just a year with a fraction of the manpower begin 3D World.

I WON A BET AGAINST AZUREN! WOOOOOOOOOOAAAAAAAAHHHHHHHHHHHHHHHHHHH
:3












