Something that doesn't require me to be creative and build my own worlds and games, like Disney Infinity or Minecraft.
Maybe a more complex and better and exciting Subspace Emissary-type-adventure? It doesn;t have to be Smash-fighter. Could be adventure, rpg, platformer...or a little of everything! With most main worlds already there, like DK, Mario, Zelda, Pokemon ect, but some playable characters need to be unlocked by amiibo.
2 amiibo of same franchise like Zelda, would unlock aditional features inside the Zelda world. And every amiibo can be playable..........if you get every amiibo.