https://www.polygon.com/blizzcon/2018/11/2/18057498/world-of-warcraft-tides-of-vengeance-launch-date-blizzcon

World of Warcraft: Battle for Azeroth’s first major patch — Tides of Vengeance — is set to release later this year, on Dec. 11 in North America. Patch 8.1 brings a few key changes to Battle for Azeroth’s systems, as well as some extra content for players to engage with. At the World of Warcraft: What’s Next panel at BlizzCon 2018, the game’s developers ran down all the content coming early next month.

Tides of Vengeance is the story of the Alliance striking back against the Horde, with the Night Elves taking center stage after their home was burned down in the pre-patch. The upcoming patch also features a Horde versus Alliance raid — a first in World of Warcraft history — where each faction will have a completely different raid order, despite eventually all fighting all the same bosses.