In advance of Warlords of Draenor's official release on November 13. Blizzard WoTLK Gold this week launched the free Iron Tide content update for World of Warcraft . It features some of the following (via Blizzard's official description):

"Iron Horde Incursion" World Event: players looking to disrupt the Iron Horde invasion can journey to the Blasted Lands to take on the force and explore the new five-player version of the Upper Blackrock Spire dungeonNew Character Models Many of the race models in the game are brand new and enhanced, including increased resolution as well as updated animations and facial expressions. Improved Interface Questing is now easier than ever before thanks to an updated quest log and inventory adjustments with the Toy Box for the fun items acquired through adventuresCharacter and Class Changmyriad characters and classes-specific Updates are now available which makes this an ideal time for players to refresh themselves with their characters before the expansion's November 13 launch

There is a comprehensive description of changes and other features to the Iron Tide update through the patch notes.

In addition, Blizzard has announced another special promotion that will entice players to pick the Warlord of Draenor in the coming month. All previous World of Warcraft expansions (The Burning Crusade, Wrath of the Lich King, Cataclysm, and Mists of Pandaria) have been added to every existing World of Warcraft accounts. This means that all current subscribers (and everyone reactivating their accounts) will have access to the most recent content.

Digital HD editions of World of Warcraft release on September 13. If you'd rather wait to get a physical copy that includes an array of extra content however, you'll have cheap WOW WoTLK Classic Gold till September 27 when they release the DVD, Blu-ray and 4K versions are released.