Minecraft Dungeons will launch for Xbox One and PC in spring 2020, publisher Microsoft and developer Mojang announced at the Microsoft E3 2019 press conference. Other platforms are currently unknown.
Here is a brief overview of the game, via Microsoft:
Fight your way through an all-new action-adventure game, inspired by classic dungeon crawlers and set in the Minecraft universe! Up to four friends can play together in local and online co-op.