Blizzard has released a blog giving an overview of Patch 10.1 Embers of Neltharion!
The stage is set for more adventures within the Forbidden Reach in the 10.0.7 content update. But much more is taking shape beyond those island shores as we delve deeper into the Dragon Isles with the next content update—Embers of Neltharion.New Zone: Zaralek Cavern Gather your courage as you venture into this mysterious underground cavern where you’ll explore, undertake new quests, meet intriguing new denizens, and experience new Dragonriding updates.Players will also encounter new rare and elite creatures and claim new treasures. Deep beneath the Obsidian Citadel from which Neltharion once defended the Dragon Isles lies a vast hidden laboratory where the Earth-Warder conducted experiments… forbidden practices he wanted to conceal from the other Aspects.
Within these halls lies the shadow chamber from which Neltharion first communed with the Old Gods, walking a path that would one day lead to his transformation into Deathwing.While Raszageth has been defeated, the Primalists carry on in their bid to unravel all the Titans have wrought and must forge new alliances–or rekindle old ones. As the heroes of Azeroth pursue enemies into the dangers of Zaralek Cavern, they are aided by the local inhabitants found under the Dragon Isles — the molefolk known as Niffen and the Drogbar.
They may not know much of the surface wars, but their knowledge of the underground is key to players and their allies finding their footing within. New Raid Dungeon: Aberrus, the Shadowed CrucibleBreach Neltharion’s secret laboratory hidden within Zaralek Cavern.
Read more on wowhead.com