Obligatory 'you know she won't die etc etc'
If we lived in a wacky alternate reality where she was to actually die, then I cannot say I really care so long as she does, that said if I had free reign she should be standing on the edge of a cliff at teh end of the fight and out of nowhere Arthas reaches up and tosses her into Oblivion, then we get some cutscene with Arthas doing Arthas things and setting up 9.2.