Edit(10am): Blizzard reverted the page back to his old version, like the info have been put too soon.

The Official World of Warcraft website has had its Under Development page updated today with a piece of info about the 2.1.0 patch:

World of Warcraft: The Burning Crusade: The Black Temple

Originally founded as a Draenei temple, this plot has been conquered and despoiled many times throughout the history of Outland, removing any spiritual grace it may have once held. The Black Temple has been the stage of the Orc Horde's blood curse, a fortress for the then-mortal Ner'zhul, and a prime staging ground for the Burning Legion's campaign of destruction. Most recently, it has been claimed as home by Illidan, where he and his minions make their bid for power over the remnants of the shattered planet. Now, it is up to you to face the malefic forces of Illidan and his minions in hopes of freeing Outland from chaos and tyranny.

Black Temple is a 25-person raid dungeon located in Shadowmoon Valley.

* Explore an ancient site steeped in Warcraft lore
* Gain access to more than a hundred new rare and epic items, including tier-6 armor sets
* Choose your path through a nonlinear level-70 raid dungeon, as you make your way to...
* Face Illidan himself