Well, when I my agents and I went to Storm Peaks, Loken in Halls of Lighting yelled:
"I have witnessed the rise and fall of empires. The birth and extinction of entire species. Over countless millennia the foolishness of mortals has remained the only constant. Your presence here confirms this. My master has shown me the future, and you have no place in it. Azeroth will be reborn in darkness. Yogg-Saron shall be released! The Pantheon shall fall! "
But I don't know why Yogg-Saron isn't awakened/released yet.
As for SW2, if he doesn't enter Storm Peaks, Crystalsong Forest and Dragonblight, I may accept the peace treaty.