Now i've seem a lot of speculation threads about who is actually behind the mists which had once shrouded pandaria, but none of which that i have seen have made the suggestion that the breifly mentioned Kvaldir in Wrath of the lich king could be behind the mists. Its clearly shown to us in the short questline in Borean Tundra that they have control over mist, and use it as a weapon to take over the small pal'ea Tuskar village.
I know people are going to suggest that all Vry'kul live in northrend, but we have already been shown a tuskar who lives in pandaria, i could seriously see the Kvaldir being behind the mists, and i really love Vry'kul as a whole, so it wouldn't bother me in the slightest.
I for one would love for n'zoth to be behind everything, but despite my own preferences, how would people react if the Kvaldir were used as new major enemies, with major storylines and raids in later patches?
I apologise if a thread has already been made regarding this.