Kirby - Kirby vs Ridley

You know, this would be an awesome concept for a Kirby crossover/spin-off game; Kirby gets transported to different Nintendo worlds.
Have some Zelda, Mario, Pokémon, and Metroid worlds based off of different games throughout their series, all the while you get to run through, sucking up Octoroks, Koopas, Koffings, and Space Pirates.
There can even be a few stages based off of single levels from Splatoon, Fire Emblem, Animal Crossing(?), and a Nintendo level full of Miis and stuff like that.

Nintendo, if you're reading this, I have plenty of other great ideas.