I really hope to see Garrosh cutting off Sylvanna's head...then the forsaken will be in war against the horde.Alleria come back ,and meet her sister dead.Then make Lor'themar join at her with the BE's to avenge Sylvannas.After a long war,the horde rise in victory ,exterminating all forsaken and all BE's.Then,Alleria defeated on the ground,with a last breath shot a arrow into Garrosh chest (based on Vol'jin prevision)......he just take off the arrow from his chest,look at Alleria,then laugh and ordered a grunt to impale her in front of Honor hold,as a gift to her son.
Btw,that'll never happen because Blizzard knows most of their players in the horde are BE's and Undeads....And they still sucking the horde forever,with a legion of players worshiping their bitch Dark Lady.