Blizzard has announced the release date for phase 4 and Zul'Aman, as the new patch arrives on March 22nd and the raid on March 24th.
The next content update for Burning Crusade Classic, The Gods of Zul’Aman, will be available on the week of March 22. The new Zul’Aman raid will unlock on March 24 at 3:00 pm PDT. Details are below.

Muster your Forces on March 22:
The release of the content update for Burning Crusade Classic provides a variety of changes to help you prepare for your adventures within the heart of the one-time capital of the Amani tribe—Zul'Aman.

Dungeon and Raid Updates
All Outland dungeons now have been adjusted to their final, reduced difficulty state.
Heroic dungeon keys now require Honored reputation (down from Revered).
Zephyr has made her way to the World’s End Tavern in Shattrath City, offering players who have Revered with Keepers of Time a free teleport to the Caverns of Time in Tanaris.
Epic Gem Updates
Magtheridon’s Black Sack of Gems and Jewelcrafter’s Brilliant Glass can now contain epic gems. Note that existing Brilliant Glasses and previously looted, unopened Black Sack of Gems will not contain epic gems.

Additional Updates
Primal Nether and Nether Vortex are no longer soulbound.
Nether Vortex can be purchased for Badges of Justice from G’eras in Shattrath.
Enter Zul'Aman and More March 24:
In the Eastern Kingdoms, just south of the once beautiful elven kingdom of Quel'Thalas, the eerie Ghostlands beckon would-be adventurers, daring them to enter the Amani stronghold of Zul'Aman.

Enter Zul'Aman
Bring your staunchest allies with you if you want to face the dangers within the heart of Zul’Aman and claim the treasures within.

The stronghold of Zul'Aman has stood for millennia as the Amani trolls' seat of power and bastion of the fearless, cunning warlord Zul'jin.

Zul'jin has spent several years plotting behind Zul'Aman's walls. Furious at the Horde for allowing his hated enemies, the blood elves, to join its ranks, he eagerly embraced a scheme that the witch doctor Malacrass proposed: to seal the power of the animal gods within the bodies of the Amani's strongest warriors.

Face the Warlord Zul’jin
Will time be on your side as you fight your way through Zul’Aman to defeat the devious warlord Zul’jin at the seat of power of the Amani trolls and stop him from exacting his deadly vengeance?

New 10 player raid: Zul’Aman
Defeat the devious warlord Zul’jin at the seat of power of the Amani trolls and stop him from exacting his deadly vengeance.

Raid bosses: 6 (Nalorakk, Akil'zon, Jan'alai, Halazzi, Hex Lord Malacrass, Zul'jin.)
Level: 70
Location: Ghostlands, Eastern Kingdoms

There is no attunement required to enter the instance. Zul’Aman has a 3-day reset lockout.

Timed challenge: Amani War Bear
Zul’jin and his lieutenants are holding several hostages in Zul’Aman. When you enter the instance, the Amani will begin preparations to terminate them. If you defeat one of Zul’jin’s lieutenants and reach a hostage before time runs out, you’ll be rewarded with an additional piece of loot and a timer extension—a brief stay of execution. Rescue all hostages, and your raid will be rewarded with one Amani War Bear epic mount.

Beyond Zul'Aman
Outland World Boss Changes
Doomlord Kazzak and Doomwalker are now more eager to share their spoils. Their loot is now Bind on Equip (from Bind on Pickup).

Badge of Justice Updates
The following bosses can now drop Badges of Justice, giving you more opportunities to obtain this valuable currency:

Doomlord Kazzak and Doomwalker
All bosses in Karazhan, Gruul's Lair, and Magtheridon's Lair
All bosses in Serpentshrine Cavern and Tempest Keep
All bosses in Zul'Aman
In addition, G’eras in Shattrath now has new, more powerful wares to offer in exchange for Badges of Justice.

Profession Updates
The following Leatherworking items can be trained or have their recipes purchased from Outland faction vendors:

Greater Drums
Knothide Quiver
Knothide Ammo Pouch

Upcoming Changes in Burning Crusade Classic Phase 4 - Heroic Keys at Honored
Once Burning Crusade Classic Phase 4 hits live realms alongside the release of Zul'Aman, players will be able to purchase Heroic Dungeon keys at the Honored reputation, instead of Revered. Buy Cheap Classic TBC Gold now!

The reputation requirement for obtaining heroic keys will be lowered to honored when Zul’Aman is released.
Below is a list of the available Heroic Dungeon keys and what factions will need to be at Honored before purchase --

Key Name：Flamewrought Key, Reservoir Key, Auchenai Key, Warpforged Key, Key of Time

Dungeon Hub: Hellfire Citadel, Coilfang Reservoir, Auchindoun, Tempest Keep, Caverns of Time

Honored Faction Required: Honor Hold / Thrallmar, Cenarion Expedition, Lower City, The Sha'tar, Keepers of Time

Zul'Aman's army grows more powerful by the day, hungry to exact vengeance in the name of its fearless leader, Zul'jin. A new raid is coming, and everyone is preparing for it. Come to MMOSO to Buy TBC WOW Classic Gold! Welcome to the new record in the best condition.