Ok Maybe its just me but given certain things Blizzard had been rumored to be planning the dogfight makes a lot of sense. Warcraft 4 has been a rumor how long. You can't have a fourth war with Thrall and Jaina always keeping the peace. All of this is just more and more plot building and I agree that at least one of the heroes (Sylvannas and Proudmore) will not be coming out alive. This to me just look like some much larger plot leading into something much farther down the line.