Young Justice League and Justice League Book1: Who am I

The war had begun Brainiac the number one villain that everyone hates, Two babies are born on the same day and the same time. One night in Gotham Batman and Joker were fighting on an old factory a young super hero woman was hiding from Brainiac's troops she went on an old factory where Batman and Joker was. She ran when the troops had found her. She gave one babe to Harley Quinn and she gave the other one to Batman.

Few years later, two orphan girls had different powers, hair style and color, different clothes and different sides but they had the same last super names when they come out at night or day to save or destroy the world. Brainiac had try to find these girls in years for his master plan to work he even had to push it aside because of that.

Will they ever work together or fight? Will They ever know each other? Or will Brainiac find them and use them?