If she comes back I'm guessing it would be something do with Alleria and the void magic she use. I don't think it would be a large storyline more like advice or to get information to help with an issues with Alleria.
Sweet. I've been waiting 2 years for her to come back.The prototypical tragic hero.She didn't do anything wrong. Just a tad extreme due to desperation. We failed her by protecting the establishment. If we helped her, there will be no more death, and those that died can come back to life.In a universe where multiple races have (or had) immortality, it's not an issue whatsoever to make everybody immortal. So don't use RL emotions on Sylvanas.
No *!@#ing way!