I'd put good money on N'zoth and Azshara FINALLY appearing in the next expansion, but this is just bullshit Jesus-in-toast face-on-Mars pattern-seeking.
I think the bigger clue is Xal'atath's quote when seeing the Remnant of the Void at the end of EN.
Xal'atath, Blade of the Black Empire says: Almost completely gone, as if it never existed. But the rift is deep and vast, and somewhere down there it sirs. Something has changed, the last prison weakens. We must prepare.
Couple this with other quotes from the blade, and it strongly hints that Xal'atath is a remnant of the fifth old god Azeroth once had, and was devoured by the others on defeat. Further, N'zoth was involved in the Emerald Nightmare, as Malfurion spoke of a darkness in the Rift of Aln different to anything he'd known before, and unable to cleanse it (a novel where Malfurion pushes back the Nightmare the first time, after the events of Yog'Saron's death and before cata). With Yog already being dead, that only leaves N'zoth as the only Old God influencing from the Rift of Aln.
I also think Jaina is a character that got built up over the years. Why else should they have changed the model several times to show that she turned more angry each time?. that all has to lead up to something. After a perfectly built up Gul'Dan she may be the next powerful foe. After disappearing and after so many clues that hint to sth related to Kul'Tiras, at which better time Jaina could show up if not with such an expansion?
Not sure how you concluded a swirling beam shooting straight to the sky is equivalent to many spirals being pushed onto (or away from) the Maelstrom.You do see it. There is a spout of the exact same energy constantly rising from the Maelstrom
Same energy, different effects.
Just checked in both the shaman class hall and in Deepholm. They are both the exact same swirl of energy.
And both of them are drawing energy IN, not out. The energies are flowing from the tip of the "tentacles" towards the circle.
My guess is they wanted to make it look like while in Deepholm you are actually looking at the sky above the Maelstrom looking through it.
Like picture an Hourglass, botton part is Deepholm, above part is Shaman class hall the middle choke point is the Maelstrom and you are looking straight up trought the middle of it.
I don't think it's any reference to N'Zoth, i just think its swirls of energy.
"Drown yourself in the circle of stars"
What we are looking at in Deepholm is a circle of energy with stars at the back, the stars are in no where in a circular pattern.
My guess is that we will most likely see the circle of stars in either 7.3 or 8.0 there has to be some clues given to us that aren't actually in the game yet.