Would there ever be a scenario where Blood Elves forgive the past "misdeeds" of the Alliance and return home to join the Alliance (from a lore perspective)?
I mean, Kael'thas is dead and the horde had a part in killing their leader. Also, It would make sense to have them return to the Alliance, especially if the Horde were to receive 2 new races to compensate (Ogres and Aaroka).
Just a thought.