for anyone who doesnt know who she is shes a character from the comics http://www.wowpedia.org/Valeera_Sang..._the_Lich_King and while she says she belongs to neither the horde or the alliance she also says she is loyal to varian and his son anduin and in wow showed up to help varian during the battle for undercity.
so i was thinking since aethas obviously wouldnt be the one vying for neutrality now maybe in the next expansion or something valeera could be the one to bring some of the blood elves back into the alliance through her friendship with varian. it would also open up some more room for strong female characters without "poofing" them out of nowhere which blizzard has said they would like to work on adding more of.