New concept art has surfaced online that appears to come from Project Moonlight, the cancelled Warner Bros. kart racer previously reported to have been in development at WB Games San Diego. The images were shared by MultiVersus-focused account AusilMVS and subsequently circulated through Reddit, showing what appear to be previously unseen character and vehicle designs from the project. Warner Bros. has never officially announced Project Moonlight or authenticated the newly surfaced artwork, so the images should still be treated as leaked development material.
The most notable artwork appears to show Bugs Bunny and DC’s Cyborg wearing prehistoric-style outfits, alongside vehicle concepts inspired by other Warner Bros. properties. One kart resembles Bubbles from The Powerpuff Girls, while another appears modeled around Princess Bubblegum from Adventure Time. The designs fit earlier reporting that Project Moonlight was intended as a broad Warner Bros. crossover rather than a racer centered on a single franchise.
Project Moonlight itself is not a new discovery. In March 2025, Colin Moriarty reported on Sacred Symbols that Warner Bros. Games San Diego had spent years developing a crossover kart racer under that codename before the studio was closed. Moriarty said he had seen gameplay footage and described the project as a stylized drift racer built in Unreal Engine 5 with clear inspiration from Mario Kart.
According to that earlier reporting, the game would have drawn racers and environments from across Warner Bros.’ catalog, including Adventure Time, Scooby-Doo, Tom and Jerry and other properties. Possible final names reportedly included WB Racers and XDR, short for Cross-Drift Racers. That crossover approach would have placed the project in similar territory to MultiVersus, which also combined characters from otherwise unrelated Warner Bros. franchises in a single game.
The development reportedly went through several major changes before cancellation. Project Moonlight began as an online free-to-play game planned for PlayStation, Xbox, Nintendo Switch and mobile devices, according to the 2025 report. Switch and mobile versions were later dropped, and the project eventually shifted toward a paid PC release that would have launched through Steam Early Access.
Moriarty’s source described a development process that lacked a consistent direction, with the project’s business model and platform plans changing repeatedly. WB Games San Diego reportedly had more than 100 employees during part of the game’s development, but the project never reached release. Warner Bros. shut the San Diego studio in February 2025 as part of a broader restructuring that also affected Player First Games and Monolith Productions.
The newly leaked artwork provides a clearer idea of how Warner Bros.’ crossover concept may have been translated into vehicles and alternate character designs. Rather than simply placing familiar characters into generic karts, the material suggests the team experimented with vehicles that visually represented individual franchises. The Bubbles and Princess Bubblegum-inspired designs in particular point toward a more heavily themed approach to the roster and its equipment.
There is no indication that Project Moonlight has been revived, and the appearance of development art does not suggest Warner Bros. is returning to the project. The material instead appears to be another example of concept work from cancelled games emerging after development has ended, similar to recently surfaced concept art from unreleased Tiny Tina’s Wonderlands and Brothers in Arms projects. Such material can provide a better picture of how far an abandoned game progressed without confirming that every design shown would have reached the final product.
Some details surrounding the leaked images remain uncertain because their original development source has not been publicly documented. The artwork’s characters and vehicle themes are consistent with what was previously reported about Project Moonlight, but Warner Bros. has not verified the images or identified the artists involved. Any interpretation of specific costumes or franchise references therefore remains provisional.
For now, Project Moonlight remains a cancelled Warner Bros. crossover racer that never received an official announcement. The newly surfaced concept art offers the clearest visual look yet at how its MultiVersus-style roster might have been adapted into a kart-racing format, even though the project itself remains firmly in Warner Bros.’ abandoned development history.
