Afk Skinny
3D Krusader
I don't expect Mileena to make it in this game at all, but they can easily incorporate her using her claws and applying different buffs to them, have her using command grabs, give her different uses out of her ball roll, turning her sky kick into a sort of overhead that she pounces on the opponent and mauls them. Maybe give her a few strings with the sai, but with her somewhat feral nature, and some competency in sorcery, she really doesn't NEED sai. It's just we automatically associate her with sai since that what she always usesAs a Mileena main who is not whinny, I'm saddened by all the Mileena hate.
Having said that, I would be very, very surprised if she made it into the game, seeing as how Highborn Kitana has Halfblood Stance and one of Kitana's Gear is a Sai.