some more wow lore points: original idea was for garrosh to be imprisoned in outland, and he finds a way to raise the old warchiefs there. also this would let them redo outland to a degree as they were not happy with the way it turned out (editor note, lol @ BC best expansion people). but they decided this may lead to problems with having this power, so they came up with the plan of visiting original draenor instead.
many of the things "known" have happened, portal being built, guldan offered the 'curse'. but having listened to garrosh the other clans declined this time.
khadgar will be making the trip. leading the alliance will be the male draeni seen in the BC cinematic but underdeveloped otherwise in BC, determined to revise the fate of his people he experienced.
a draeni female with a 'joan of arc' character type will be leading the existing draeni people.