The way things are now, Sylvanas can’t possibly stay Warchief. With Saurfang, Baine and soon Lorthemar and Thrall all turning on her, it’s obvious that SOMETHING is going to happen. The question is what.
Personally, I can think of 3 ways this situation could be dealt with
Sylvanas was good the entire time
I really hope this doesn’t happen, but it’s very possible.
I.e. they could reveal that all of this uselessly evil stuff she’s pulled throughout BfA was just a means to draw out N’zoth so that she can deal with him in some way - like sealing him in Xal’atath’s now-empty dagger.
I could see this scenario ending with her stepping down as Warchief but remaining active within the Horde
She’s in league with N’zoth and we have to get rid of her
Supposedly, undead are resistant to the void, but they could always establish a limit to this resistance. This would explain why she had us free Ashvane and why she was so giddy about receving Xal’atath.
This would likely end with her getting properly killed off, sealed within Xal’atath herself or perhaps coming back to her senses and sacrificing herself to stop N’zoth
She was always only out for herself and the Forsaken
I.e. she started the war with the Alliance so she’d have more corpses to raise as Forsaken, etc. In this scenario, Xal’atath and Ashvane would likely be written off as tools she attempted to use to win the war, not as indications of her being legitimately on the N’zoth’s side.
If this comes to pass, I could see Sylvanas leaving the Horde and forming her own (non-player) faction of undead, along with most of the Forsaken NPCs
What do you think?
Personally, I feel like number 1 is the most likely, though I hope and pray that the story doesn’t go that way. Number 3 would probably be the best compromise between fans and haters of her character, even if it would be a tad boring.