Batman - Arkham Unhinged #13-14 (2012)

Batman: Arkham Unhinged #13
The Abramovici twins, no longer conjoined, find themselves on separate sides of a smoldering feud between Joker and Penguin. But how will Joker react, considering only one twin should have survived?

Batman: Arkham Unhinged #14
Robin goes solo in the start of this new, three-chapter storyline. Rumors of an underground fight club run by the Penguin lead Batman's partner to coin an alias and journey below Cobblepot's Iceberg Lounge. But the Boy Wonder is about to find himself in the middle of a heavyweight match between Bane and an even more frightening opponent.