Harley Quinn might be a good female villain, especially due to Heath's demise,
They gave Batman a good base, in #1, a great look into his morality with the joker (my heart broke when joker was hanging upside down, saying the haunting line that they complete each other.) for #2.
Now its time to play the tragic hero with Harley or Cat Woman, so he will have a love interest, and nemesis all in one, with them killing the asst DA,,,shame she was so much better that whats her name