My bets:
- The story will be very Horde-centric.
- We will find out that Sylvanas’ endgame is to kill Azeroth (and everyone on it) and turn it into a realm of undeath. In her twisted mind, it’s the way to give the world peace.
- Saurfang will die. It will remind us of Grom’s sacrifice in Warcraft 3
- Baine will step up, do something awesome and lead the Horde
- Sylvanas will escape, revealing that her pact with Helya still stands. She escapes, with her dark ranger forces, in a kvaldir fleet.
- There will be hints of what comes next: the war between Death and Void for the fate of Azeroth, as both Helya/Sylvanas and N’Zoth’s forces seek the same fount of power to fulfill their goals.
More predictions in my thread: Sylvanas’ Endgame.