For what it's worth I'm not any happier about the sparkly undead that are likely coming our way than you are but as far as Allied Race requirements/patterns go they pretty much hit the nail on the head. (female models, easy customization for blizz, the whole "death" thing will probably tie in with whatever pre patch fuckery involving the scourge is going to happen) And given that the Alliance already has a sparkly version of a core race that means hordies will likely have to suffer this insult(I'm genuinely sorry and hope I'm wrong for your sakes)
The Ankoan and Jinyu are cool in their own ways but they don't fit the bill for AR's at least not from what we've seen, if blizzard has been sitting on female models for this long just for shock value I'd be pretty fucking impressed, but as it is now they're as likely to become a race as pre-Cataclysm Worgen (possible, but not without a lot of work on blizzards end)