Could there be an Emerald Dream expansion prior to the next Burning Legion appearance? Yshaarj mentions Ny'alotha which if you recall was mentioned in the Puzzle Box of Yogg-Saron item in Cataclysm. It is thought that Ny'alotha is located inside the Emerald Dream. Definitely an interesting turn. I feel like Wrathion has more work to do before a Burning Legion appearance.