The first Minecraft Dungeons DLC is Jungle Awakens, due July

Minecraft Dungeons will receive two DLCs as part of its Hero Pass, and the first of them has been revealed on the Mojang blog. Called Jungle Awakens, it’s a three-mission adventure set, yes, in the jungle. New weapons, armor, and artifacts will all be included as well as new enemies like the leapleaf, poison quill vine, and jungle zombie. It’s due in July.

The second DLC hasn’t got a date yet, but it’s called Creeping Winter and will be released later this year. All this information matches a leak from a week ago, which included screenshots of Creeping Winter featuring a polar bear as well as some cold and unhappy zombies and creepers.

source: gamezpot.com