Well apparently new Smash will be playable by June 11th. Much sooner than I expected https://twitter.com/NintendoVS/status/976790642314522624
So I guess it's not gonna be a whole new game?
I cannot help but suspect it is~! Though the Wii U's short lifespan might make it feel like it hasn't been long enough since the previous game, a new Smash Bros is usually released within a couple of years of a new console's release. Right on time!