I dunno, the Horde seemed pretty against the Lich King and his methods, and considering she's mimicking him now... well, between that and the Wrath Gate, who's to say she's really telling the truth, eh?
Don't get me wrong, I've always loved Sylvanas as a character. I honestly don't like the road they're taking her down. But they're going down it. So, oh well.
Sylvanas should use the Valkyr to recruit the Vrykul to her armies, to be more of the Lich Queen.
"Laws should be made of iron, not of pudding."
“A good act does not wash out the bad, nor a bad act the good. Each should have its own reward.”
- King Stannis Baratheon
Lillian Voss will replace Sylvanas when she finally cracks. Mark my words. They ain't doing that much character development on her for shits and giggles.
slyvanas has been told by the horde to "get in line and behave"since the first WoW and yet nothing really has been done. Its just "oh lets send some more horde guards to make sure she is a good little girl"
Frankly at this point i dont think anything will happen, Slyvnanas can do bloody well what she pleases, the horde thus far is just hot air
"I see nothing. I hear nothing. I taste victory."
"Trolling (verb): speaking your honest opinion." - you know who
She has, unknowningly. Putress released the plague on the Scourge, Alliance, and Horde forces at the Wrathgate, the plague that she commissioned Putress and the RSA to create. She can claim that she didn't give the order to use it then, but she was specifically moving towards that goal, to use a plague to kill every living person on Azeroth (with the possible exception of the Blood Elves). She wants everything that isn't Forsaken or a Blood Elf dead.