Key Notes
- WB All-Star Mayhem brings nine animated franchises into an idle RPG with more than 100 characters planned for launch.
- Limited regional testing is due on iOS and Android in November, while a worldwide release date remains unannounced.
- Kabam is developing the free-to-play crossover under licence from Warner Bros., with more characters and worlds planned after release.
Batman and Bugs Bunny are heading into the same mobile RPG, with Brain holding the remote. Kabam has revealed WB All-Star Mayhem, a free-to-play idle game that plans to bring more than 100 characters from nine Warner Bros. animated series together at launch.
The first opportunity to play will be a limited regional test on iOS and Android in November. A worldwide release date is still to come, so this is an introduction to a new crossover rather than a global launch announcement.
A Cartoon Lineup With Room for Strange Teams
Kabam’s announcement names Justice League Unlimited, Adventure Time, Looney Tunes, Teen Titans Go!, Animaniacs, Scooby-Doo, Steven Universe, Samurai Jack and The Powerpuff Girls. Players will combine heroes and villains from those shows, with Superman, Finn and Jake among the characters already named.
Brain provides the excuse for that crowded casting call. He gets hold of a Universal Remote that can reach television worlds, then recruits villains and gives them new powers. The adventure crosses settings such as Metropolis and Samurai Jack’s future, with the assembled team trying to stop him rewriting their stories.
The characters use 2D animation, and Kabam says the roster will grow with further characters and worlds after release. The attraction is easy to understand: a team can draw from several very different corners of Warner’s animation catalog instead of staying inside one show.
Kabam Takes Its Collection Formula Somewhere New
The studio already has experience keeping a large licensed roster active. Its Marvel Contest of Champions built an arcade-style fighting game around collecting Marvel heroes and villains. By April 2025, that roster had grown from 26 characters at launch to more than 300, according to PocketGamer.biz’s report.
All-Star Mayhem is being introduced as an idle RPG, which points to a different rhythm from that game’s direct fighting controls. Kabam has yet to explain the full combat and progression systems. The familiar faces are the hook; how much involvement the battles ask of players remains an important part of the reveal still ahead.
A New Mayhem, With a Regional Test First
Looney Tunes fans may recognize part of the name from Scopely’s World of Mayhem. That separate mobile game closed on October 15. Its shutdown notice explicitly ruled out transferring progress to another title, so an old collection should not be treated as a head start in Kabam’s game.
The regional testing plan is the next practical milestone, with broader availability to be announced later. Kabam’s teaser site currently offers an email signup for news. Players interested in building a squad can register there while they wait for participating regions and access details.
