When she was first spotted on set sporting red hair, fans starting assuming that Jena Malone was going to play Carrie Kelly aka a Robin in Batman v Superman. THR reported that she was indeed going to play the role, until now.
According to Latino Review, Malone has been cast as Barbara Gordon, fans might know her as Batgirl or Oracle. No news on what exactly her role will be in the film but it can go in any direction. The film could include Batgirl or it could even be a flashback in where the Joker shoots her, committing her to a wheelchair.