Batman and Nightwing are forced to team with the Joker's sometimes-girlfriend Harley Quinn to stop a global threat brought about by Poison Ivy and Jason Woodrue, the Floronic Man.
Dracula, Mavis, Johnny and the rest of the Drac Pack take a vacation on a luxury Monster Cruise Ship, where Dracula falls in love with the ship’s captain, Ericka, who’s secretly a descendant of Abraham Van Helsing, the notorious monster slayer.
When a hulking monster arrives on Earth and begins a mindless rampage, the Justice League is quickly called in to stop it. But it soon becomes apparent that only Superman can stand against the monstrosity.
In an alternative Victorian Age Gotham City, Batman begins his war on crime while he investigates a new series of murders by Jack the Ripper.