Issue: #1
Batgirl and Supergirl must team up to break into Arkham Asylum! In this all-new Rebirth annual Batgirl must seek Supergirl’s help to solve a mystery that leads them to the heart of the most insane insane asylum there is! But what they discover—and who they discover—in Arkham will lead to a much, much bigger story!
First appearances: Red Spur
Creators: Dave Wielgosz, Rebecca Taylor, Mark Doyle, Deron Bennett, Bengal, Eleonora Carlini, Eva de la Cruz, Hope Larson, Inaki Miranda, Mat Lopes, Vita Ayala
Characters: Barbara Gordon, Supergirl, Supergirl, Operator, Psi, Red Spur, Riot Black