Originally Posted by
shoc
Not sure what you're calling terrible, all we know so far is that they've been fighting the Legion for a thousand years and that Alleria spent some time on Draenor, and recently escaped from a Demon prison.
I doubt that after a thousand years of battling the Legion, Alleria would just come back to get caught up in Azeroth's asinine politics and drama, even if it does involve her own sister. That would be poor writing if Alleria suddenly gave a shit about the faction divide.