Since it’s not dimensius, then who?
Xalatath?
Idk since she’s supposed to be in TLT.
Alleria?
Maybe. Though unlikely.
Azshara. This is my most likely option. It’s teased she’s working with Xal and is searching for “the true throne of power”
Wild card.
Old god council with nzoth cthub, yogg and yaash
Ewoks.
10 c
Khadgar’s Wheelchair.
“void beings invade quelthalas and attempt to blow up the sunwell”
probably nzoth
Idk nzoth being the FB for two expansions??
Toe’zoth
clearly
Odyn, or he’ll be one the first or mid-bosses of The Last Titan.
Xal’atath could be the endboss for Midnight, but it depends largely what role she is ultimately going to serve. She’ll either be a mid- or final-boss of Midnight, or an early boss in The Last Titan or a second to last boss for some greater foe on par with a void-infused Galakrond (it won’t be that most likely but something to that scale).
Odyn is definitely gonna get smacked up in TLT
Hm yeah I expect nzoth somewhere in there but final, perhaps one of the titans or some spawn of sargeras or something. The last expansion after midnight was described as things “spiraling out of control” and leading back to Northrend w/ some clash with the titans of some kind. I don’t know what boss sounds the most like it would lead into that.
Xal’atath and then she gets converted with the power of friendship cause blizzard can’t kill off waifus and then we will fight iridkron and some titan in the finale expansion
IMO Azshara is too juicy an antagonist for something like Midnight to not at least get a whole tier to herself.
Teron gor. We havent killed him enough times.
Well she’d be the final boss of the expansion potentially
its going to be Turalyon and the Naaru- who will turn evil .
Having a light FB for midnight would certainly be a twist
I just hope it’s not another horde leader so we can stop hearing from certain blood elves how alliance biased this game is. 
It’ll probably be Xal’atath and then the next will be something titan related.
I think there’s even odds that she or Xal is the mid boss.
In fairness if it ends up being Legion II there’s a lot of villains they can pull from elven and void lore that are going to be competing for screentime. But Azshara is the biggest one.
I didn’t think we’d go to K’aresh until Midnight, and yet we’re getting it as the last patch of TWW… so… I don’t know. I could see Azshara since the Sunewell is on an island, but maybe she ends up being another Ansurek. Unless they try to do some weird twist with her, I could see Xal’atath as the last boss for Midnight. But, who knows at this point. Maybe we defeat Xal early in the expansion and spend the rest of it dealing with the oncoming confrontation with the Titans in TLT.
It’s me, I’m the last boss. You are not prepared for the level of hunkiness that I will bring, be careful that you don’t end up switching sides.