So
1. Demon Hunters are the new class.
2. New warchief. Yay? This seems really stupid, seeing all the effort to made to make Vol'jin a viable candidate in Mists. He has done literally nothing since then. What a waste.
3. To survive is to kill. Forsaken launch a legit invasion to bolster their numbers, the only way they can 'survive' seeing as they don't reproduce.
4. Tyr is trapped under Lordaeron and is having his power harvested by Sylvanas, same way Raden was by the Mogu. So...forsaken invasion amped on Titan Watcher power?
5. We help Anduin and Wrathion!
6. Gul'dan has been sent to our Azeroth by the Legion to summon them here.
7. See above.
8. Azshara is here to fuck shit up.
Maybe the above three are related? Gul'dan and Azshara are working together?
9. Maeiv wants to follow up on Wolfheart.
That's a hell of a lot for an expansion. If it's legit, that's amazing.