|Batman Unlimited: Monster Mayhem|
|Directed by||Butch Lukic|
|Screenplay by||Heath Corson|
|Produced by||Butch Lukic|
|Starring||Roger Craig Smith|
Brian T. Delaney
Dave B. Mitchell
|Edited by||Bruce A. King|
|Music by||Kevin Riepl|
|Distributed by||Warner Home Video|
Batman Unlimited: Monster Mayhem is a 2015 American animated superhero film and the second entry in the Batman Unlimited series. It was released on August 18, 2015 on Blu-ray, DVD and Digital HD. It is a sequel to Batman Unlimited: Animal Instincts.
A new crime wave strikes Gotham City. On Halloween Night, Solomon Grundy and Silver Banshee escape from Arkham Asylum and meet with Scarecrow, dodging Nightwing and Green Arrow along the way. Video game designer Gogo Shoto is kidnapped by Clayface. Scarecrow and Silver Banshee steal an artificial intelligence designed by Professor Ivo. Solomon Grundy steals a battery at the atomic power plant despite Nightwing's attempt to stop him. Grundy loads the battery into an ice cream truck driven by the Joker. The Joker forces Shoto to help him play a prank on the citizens of Gotham.
Bruce Wayne, Oliver Queen, and Dick Grayson attend an Inca exhibition at the Gotham Museum, where the main attraction is the "Rose Stone," a recent discovery by Cyborg. Cyborg reveals that the Rose Stone is capable of conducting energy. When the opening ceremony starts, the Joker interrupts the proceedings. Clayface takes on the form of a Tyrannosarus rex and attacks the crowd. The Joker uses a computer virus to take control of all electronic technology in Gotham, including Cyborg, who finds himself forced to fight for the Joker's side. The heroes pursue Joker and the other villains, but they escape. The villains take over the city and Joker declares himself mayor, installing the other villains in his cabinet. The heroes return to the Batcave and discover that the Joker is planning a parade in his own honor. Batman deduces that the villains are hiding out in an abandoned amusement park on the pier. The heroes travel to the amusement park, battle the villains, free Gogo Shoto, and take him to the Batcave. While there, Shoto gives Batman a device that allows him to enter Professor Ivo's virtual world.
The Joker plans to send the virus worldwide. Once the Joker's parade starts, Batman gets close to Joker and uses Shoto's device to enter the AI world, where he sees many copies of the Joker. Batman and the heroes break the Joker's control over Cyborg. After an extended battle sequence (in which the Joker dons a mech suit), Batman realizes Joker intends to use Cyborg as the transmitter to unleash the virus. Cyborg finds the Rose Stone in his left arm. On the advice of Shoto, he places the Stone on the back of the Joker's mech suit. The suit shorts out, Joker falls into the sea, and all the technology reboots. The villains are taken back to Arkham and the Joker begins preparing his next plan.
In June of 2015, Comic Book Resources revealed the voice cast.
Both Common Sense Media and CineMagazine rated the film 3 stars.
It was followed by a sequel, Batman Unlimited: Mechs vs. Mutants, which was released on July 24, 2016.