Kabam Announces WB All-Star Mayhem Mobile RPG

Kabam has announced WB All-Star Mayhem, a mobile role-playing game for iOS and Android that brings characters from Warner Bros. franchises together to stop Brain from taking control of multiple universes.

The game is scheduled to enter limited regional testing in November 2026. Players will create teams featuring characters from Adventure Time, Steven Universe, Samurai Jack, Scooby-Doo and other Warner Bros. properties.

The story follows Brain, the mouse from Animaniacs, after he obtains a universal remote and tries to take over each universe in turn. Players will control the crossover characters as they work to stop him.

WB All-Star Mayhem follows Kabam’s work on licensed mobile games, including Marvel: Contest of Champions, a long-running fighting game based on Marvel characters. The new title uses a role-playing format rather than the platform-fighting format of Warner Bros.’ MultiVersus.

MultiVersus featured Warner Bros. characters including Looney Tunes figures, DC superheroes and Jason Voorhees. The game was later removed from digital storefronts, and its developer was shut down.

Reviewed and fact-checked by Vlad Kipran on November 5.