Summary
Players help restore Hyjal, explore the aftermath of Archimonde's defeat and travel through Darkwhisper Gorge (official). Inven: 'Dissatisfied with Malfurion Stormrage giving up the Night Elves' immortality to defeat Archimonde, an unknown figure is siphoning energy around Mount Hyjal.' The 20-player Hyjal Summit raid is here.
Confidence note
confirmed_official (setting); reported (unknown siphoning antagonist)