I'm more excited about the Joker skins, I've been practicing past 2 weeks getting ready for the Killing Joke skin pack.
I personally like Joker, Hawkgirl, and Raven. But I'm sure Batgirl is almost as good as Batman on this game. I hope she gets some alt Batgirl skins like Cassandra Cain, Stephanie Brown, etc..
Batman needs a Batwoman skin, that would be cool.
My guess is General Zod will be announced in a few days.