A new mega-dungeon named Tazavesh which is also known as the Veiled Market and is included in  WoTLK Gold the Chains of Domination update. The eight-boss Mythic dungeon takes place in the bazaar of Brokers. It culminates in a "high-stakes theft" to pillage powerful artifacts.

In the end, the Chains of Domination update--which is free for subscribers--comes with new PvP Season 2 content, new Covenant cosmetic armor sets that can be used by any class and Soulbinds with additional abilities and Conduits, along with a host of pets and mounts available to collect. The update also includes flying in the Covenants Four Domains.

For moredetails, check the report of BlizzCon announcements.

Blizzard Leaks WoW: Burning Crusade Classic, Chains Of Domination Update

A leaked press announcement containing information that is scheduled to be announced at BlizzCon Online has revealed that Blizzard entertainment is planning to re-release the World of Warcraft expansion, The Burning Crusade, and brings an update for the Forsaken Horde leader Sylvanas to Shadowlands in the Chains of Domination update. It is believed that this will work similar to World of Warcraft : Classic offering a gaming experience that is nearly identical to the initial 2004 release. [Update: Blizzard has confirmed both of these announcements in the context of BlizzCon. Burning Crusade Classic is real and scheduled to launch this year and the company detailed an update to the Chains of Domination update for Shadowlands.[A]

According to the documents Blizzard claims to have released early by mistake (spotted first in the hands of MMO Champion), the company plans to release a new version of The Burning Crusade later this year, though the exact date is unknown. It was originally launched in 2007. The Burning Crusade will bring many modifications to World of Warcraft : Classic and also the Alliance Draenei as well as the Horde Blood Elves races. Like Classic before it, The Burning Crusade will come out in stages, and all subscribers to World of Warcraft can play The Burning Crusade Classic at free of charge.

Leaked media release discloses Shadowlands the next update that will include a brand new raid and boss. Named Chains of Domination, players face off against the Jailer, and Sylvanas Windrunner to unite all four Covenants. The expansion also introduces a 10 boss raid called The Sanctum of Domination (located in Torghast) in addition to an eight-boss Mythic mega-dungeon, set in the bazaar of the mysterious Brokers, a brand new Season full of cheap WoTLK Gold PvP content, and much more. There's no information on when the expansion will launch, but Patch 9.0.5 is currently in The game's Public Test Realm.