Before the last shadow falls, the Father of Sleep shall savor his feast.
This one is easy, it's Mueh'zala, who could also be, or at least have something to do with, Bwonsamdi's mysterious "boss.
The golden one claims a vacant throne. The crown of light will bring only darkness.
Sounds a lot like Calia. Although it could be about Anduin as well, but I find it quite unlikely.
When their mistress beckons, nine ravens take flight. Each seeks a prize to earn her favor.
Sylvie's Val'kyrs come to mind, but that's a bit
too obvious. I was rather thinking about the Klaxxi Paragons.
The vassal of life disguises treachery. Beware the eyes of green.
Given that Tyrande is "consumed by vengeance", maybe Blizz will spank her hubby's ass if they don't want to fully commit to a Tyrande raid/dungeon. Or perhaps someone from the Green Dragonflight?
Five lanterns, now darkened. The flame they seek will light the masters' way.
Looks a lot like the five dragonflights. But this is also
too obvious
The blind queen wields a scepter of bone. From the deep she calls forth doom.
This could be the morally grey lady, if she had rolled DH instead of a hunter/spriest hybrid spec.
The cunning ones kneel before six masters, but serve only one.
The six masters? It could be a reference to the six cosmic forces in Warcraft, but the one "kneeling" is... Hard to tell at this point.