Batman / Teenage Mutant Ninja Turtles Adventures #1

Synopsis

After a mass escape from Arkham Asylum, Batman tracks down Two-Face who tells him that the other escapees traveled to another world. Meanwhile, the Turtles investigate what they think is a Kraang portal, but instead they encounter a creature they have never met before: Clayface. Also, the Foot Clan find that a number of their soldiers have been defeated by unfamiliar foes: The Joker and Harley Quinn.