As you may know M'uru from the paladin building in Silvermoon has gone missing And Liandra decided to go have a chat with A'dal in Shattrath. The lore even expands from there. It seems M'uru has been lured by Kael'Thas. They say in patch 2.4 M'uru will be the final boss in the Isle of Quel'Danas ( Also know as the sunwell plateau). He will be joined by Fel Kael'Thas and a young warrior who aids you in the dungeon. All throughout the raids the young warrior will be fighting a mysterious dark Naaru in a void dimension which you can see above you, though not much is know from that. The instance will feature three parts. The Master's Terrace which wil be a five man featuring Fel Kael'Thas and the new and improved dark M'uru, The Sunreach Armory which may be a 10-man, not confirmed yet. Several chain quests in the Armory will open you a portal straight to the final instance of the Sunwell Plateau, bosses not yet known be we do know a dragon raid will be featured in it.
http://www.wowinsider.com/patch-2-4-sunwell/That link will give you all the details for the 2.4 patch, inclduing new NPC's, armor, weapons, a new legendary hunters bow

, and the new zone " Isle of Quel'danas". Maps included as well as videos of all the raids that go on in the instance.
Some more notes are the removal of attunement for Hyjal And BT. If you are already attuned you will receive a special title to your character " Hand of A'dal". I beleive the two instances will also drop badges of Justice now, for use in Shattrath. Also, healing may be nerfed a little bit along with shamans, yet again. And blizz may add immediate honor calculation instead of the 24 hour calculation that exists today.
Anyways check out the site, pretty neat vids all from the PTR. You can see the raids, how to get to the Island at level 1, new items, and all the patch notes as well. Hope you enjoy it
