While Shredder enters an uneasy alliance with a deadly new partner, Casey Jones is arrested by the GCPD. At the same time, a crisis breaks out at Arkham Asylum, which is bound to keep both Batman and the Turtles busy. Meanwhile, a certain young resident of Wayne Manor returns home to find a new, green occupant in his room. Co-published with IDW.

Note: Creeper, Clayface (Hagen), Killer Croc, Shredder and Harley Quinn are only on the cover.