Arkham Asylum to provide the backdrop for next Batman pic? Plot details for the next Batman movie have reportedly surfaced online. According to reports the basic outline for the script is complete and will see The Riddler as the main villain, with Arkham Asylum providing one of the story’s main backdrops. Several other classic foes are also allegedly in line for cameo appearances, including The Penguin and Mr Freeze. David Goyer and Jonathan Nolan were said to have started working on the franchise’s third instalment last month.