Batman: Arkham Knight. It's my favourite installment next to Origins. The issue is the story, they set it up all up in City with Hush being the main villain and they get a different writer for Knight and butcher his storyline. They just make him a 5 minute mission, same with Two-Face, Man-Bat, Firef- ehhh he was okay. But don't even get me started on the Arkham Knight himself.