The pre-expansion Iron Tide patch rolls out this week, adding plenty of tweaks and a wealth of new content, including skills and ability updates for all classes. A bonus to the update is that all previous World of Warcraft expansion packs, including Mists of Pandaria are free.
Blizzard appareantly made all expansion content, wioth the exception of the upcoming Warlords of Draenor pack, available at no extra cost to subscribers. This includes access to Azeroth, Outland, Northrend, the Elemental Planes, and Pandaria.
Patch 6.0.2, dubbed "Iron Tide" is rolling out this week with all its tweaks and changes, and revamped character models, setting the stage for a new Iron Horde world event, for which Blizzard has prepared the following dramatic introduction.
"The Dark Portal in the Blasted Lands has turned blood red. Hundreds of strange-looking orcs are violently pouring into Azeroth, killing everything that stands in their path. Nethergarde and Okril’lon have already fallen, and while the Horde and the Alliance moved as quickly as they could to get reinforcements to their people, they are too late. The Iron Horde invasion has begun.
In this desperate hour, King Wrynn and Warchief Vol’jin have called upon their greatest champions to join the front lines in the Blasted Lands and do whatever they can to stop the Iron Horde . . . before the rest of Azeroth falls before them."
The full patch notes are here, and that's a pretty lengthy list. Warlords of Draenor releases November 13.