Having captured a power converter from Harley, Catwoman attempts to bargain with Grodd in bringing her back to Gotham however, they need to obtain other power converters from Penguin, Poison Ivy, and Deathstroke to complete the Quake Engine. They defeat the Joker and Harley, but Grodd turns on Batman, revealing his alliance with Two-Face before the Joker and Harley escape and blow up their own ship, taking Batman down with it. Batman and Grodd agree to work together to return to Gotham.Д«atman, Grodd, Catwoman, the Bat Family, and the Bat Clan battle the Joker and his forces by the river. There, Grodd explains he intended to send the villains far away so he could take Gotham for himself, but Batman's interference sent them all to Feudal Japan instead. Robin gives Batman an invitation from Grodd to a nearby hot spring. He learns the Bat Clan helped Nightwing, Red Hood, Robin, and Red Robin upon their arrival, and the clan has followed a prophecy of a foreign bat ninja restoring order to the land. As Batman is surrounded by the Joker's minions, he is suddenly whisked away by ninja led by Eian of the Bat Clan of Hida. He transforms his Batcycle into an armored suit to defeat a sumo Bane and stop the robot hand, only to learn the mother is Harley Quinn in disguise. Just as Batman confronts the Joker, he is forced to leave and save a mother and child below from being crushed by the robot's hand.

When the Joker's troops ambush the hideout, Batman storms his way in his Batmobile towards Arkham Castle, which transforms into a giant robot fortress. Batman discovers that Alfred Pennyworth is also in the past and has built a Batcave outside Edo. In order to stop the villains from altering history, Batman and Catwoman must get to the Quake Engine in Arkham Castle (formerly the asylum). He learns from her that all of Gotham City's top criminals have become feudal lords after deceiving the Sengoku daimyЕЌ, battling each other until only one state remains. During his escape, Batman meets up with Catwoman, who reveals everyone else arrived two years earlier (due to Batman being in the outermost area affected by the Quake Engine). There, he is chased by samurai working for the Joker. While battling Gorilla Grodd at Arkham Asylum, Batman is caught in Grodd's Quake Engine time displacement machine and sent to Feudal Japan.

Batman ninja