Spoilers from the PTR for Patch 8.3:
- Calia Menethil says: Night elf sentinels? Why are you... By the Light!
Lilian Voss says: Many fell at Teldrassil. Some were raised into rage and darkness, turned against their own people. They, too, have been abandoned.
Delaryn Summermoon says: Death is… cold. Even for those who burn.
Derek Proudmoore says: Calia, I know the pain they suffer. The hopelessness. You must do something for them.
Calia Menethil says: We will, Derek. Together.
Just to note, this takes place outside The Bulwark at Tirisfal Glades.
This is curious, since we also had this during the Horde’s Darkshore Warfront introductory questing:
- Nathanos Blightcaller says: There is one more asset to acquire. One who resisted... and failed. The Dark Lady was very... specific in her wishes.
I speculate the following:
Sylvanas wanted to break the Night Elves’ hope by burning Teldrassil. As Saurfang said, she failed. She probably was not happy that the Night Elves were not broken, so sought out to raise Undead Night Elves to once again try to break the Night Elves’ hope. This worked out for the Undead Night Elves themselves, specifically Delaryn, who has the following outro when defeated in the Alliance version of the Darkshore Warfront proper:
- Delaryn Summermoon yells: Your hope... will fail you...
Yet this did not break the living Night Elves, who fought for Darkshore back, and many showed up at the gates of Orgrimmar itself along with the rest of the Alliance and Horde, some even front row center:
So my guess is that with the Undead Night Elves not leading the the chain reaction breaking of the hope of the living Night Elves that Sylvanas was going for all along, Sylvanas just abandoned the Undead Night Elves same as she abandoned the rest of the Forsaken for not working out for what she wanted.
Though there is still the joke in here somewhere about “If Sylvanas really wanted the Night Elves all dead, why did she keep raising them back up?”