I think during the Jaina fight, Katherine Proudmoore will wander in the middle of the fight area, “Hey Daughter, what are you...” *Pwned by random AoE* (You know how those hordies have trouble holding back :P ), Rasthakan bites the big one somewhere in the raid too, so for both Kul’Tiras and Zandalar the heavily faction-aligned leaders that have been propped up all of the expansion have to take over leadership of their respective people, providing a reason for the allied races to choose sides.