Keybladewielder on 28 March 2018
It all depends on the support that Nintendo gives it late in its life, because that would give it longevity; if they drop it like they did with the Wii in 2011, then no way it'll be able to reach 100 million. Hardware revisions would definitely help too (something like a New Nintendo Switch or whatever they call it), as well as a late-life Pokémon game (gen 9 pokémon game).
