The Adventures of Captain Toad could continue if there's enough interest from fans into producing similar games.
In an interview in the latest issue of EDGE magazine, co-director of Super Mario 3D World, Koichi Hayashida, didn't rule out taking the concept further if "enough fans express such enthusiasm."
Kenta Motokura, also a co-director for the game, was asked whether The Adventures of Captain Toad was inspired by smartphone titles, to which he replied: "They weren't inspired by smartphone games. The idea was to design a game that would become even more fun as you play through it" and that a "short challenge with quick results would be a good motivation for players" to progress onto the next set of worlds.
Do you think these sorts of games could be fleshed out into standalone titles or perhaps as DLC?