Minecraft Caves & Cliffs Split In Two, Partially Delayed - Kotaku

Citing the ambitious nature of the gameworld-changing update along with the current state of the real world, Mojang today announced it’s splitting Minecraft’s Caves & Cliffs update into two parts.

Part one will be out this summer as planned, with the second half coming during the holiday season.

One of the most requested updates in Minecraft history, Caves & Cliffs will revamp the way worlds are generated in the game, adding new cave biomes, proper mountains, and all sorts of new building blocks.