Yea, that place will probably end up becoming a hell of a battlefield. Though to be technical that is what happened in Wrath of the Lich King which is when this map takes room.
For stormwind to get Jaina they have to go to Theramore and they can get control of the Silver Covenant if they get to Dalaran.
P.S. Should the Humans be able to get Vereesa Windrunner, since she is the leader of the Silver Covenant?