That just makes me hate Sylvanas even more. Did you say Arthas is coming back? I want Arthas to bitchslap Sylvanas.And to the Sylvanas treehuggers I'll spell it out for you:
Illidan wanted Sargeras's power because Illidan felt jaded by the NE's. But, he secretly compartmentalized his true intentions from Sargeras in that he was working to defeat the Legion and Sargeras. It wasn't too altruistic but it was for the greater good.
Sylvanas and her actions are not altruistic. Only for her. Her lapdog Nathanos is only a tool she has. When that tool is no longer useful, she'll discard him. Her plans in comparison to Illidan's are not subterfuge to Billy Badass and be doing this to defeat the Old Gods, the Void Lords, etc. Bitch only wants power over Death and to answer to no one. HOW she plans to do that and remain relevant in the storyline just isn't altruistic for us "mortals". She is undeath. She wants Death's power but still remain among the living world. Her story's climax has come (no pun intended you dirty pervs but I like how you think) and gone. She's at her end game. Saurfang outed her end game plan, sorta.
Her diligent followers (the players) that met her at Windrunner Tower heard vague hints on her plans. Make no mistake, she used Azshara to get to N'zoth. She is not using Old God powers. She's using Death's powers. Death itself cannot manifest into the physical world. Much like Sargeras. So she is Death's Avatar, with Death's powers.
And no that doesn't mean she's in cahoots with Bolvar. Ner'zul and Arthas are still in the Helm along with Bolvar. Arthas absolutely hates Sylvanas, and thus so does Bolvar.
Hope that clears up Sylvanas for you haters. :P