In the latest World of Warcraft patch - The Tomb of Sargeras, the demon invasions have a new name. The Tomb will not be available for another couple months and there is a new class-specific quest chain with a mount at the end.
WoW's Patch 7.2 - The Tomb of Sargeras is now live, but it's namesake within the game is not. What? Well you can access the patch but not the Tomb itself - that will be available in a couple of months.
The gigantic patch takes us back to the Broken Shore to fight the Burning Legion. Apart from that, there are new class campaigns and mounts, a new dungeon and a new scenario called "The Pet Battle dungeon".
Lets run through some of the patch notes real quick:
The Broken Shore
Demon invasions - now called the Legion Assault will be featured in the Broken Shore along with the regular World quests.
You even have a chance to join the "region- and faction-wide effort to construct special buildings" crew. Just don't forget your hard hat. Or your helmet.
The New dungeon: The Cathedral of Eternal Night
The objective is to return the Aegis of Aggramar to its resting place, while besting Agronox, Thrashbite the Scornful, Domatrax and Mephistroth on the battlefield.
The Class Campaigns
New quest chains are available to all classes through the Class Hall. During the quest chains, "class specific World quests" will become available. At the end of all this (your class campaign and the Legionfall campaign on the Broken Shore), there will be a sweet, epic even, class mount waiting for you.
The Legion reputation points
The reputation points collected beyond Exalted will now go towards the Broken Isles faction emissaries. There may even be a couple of new faction mounts in it for you.
There's a slew of other updated features and you can read all about them here.
Keen eyed Redditors may have, however, spotted the grandest change of all: