Mario + Rabbids Kingdom Battle details spilled online last night via a string of leaked images.
The Ubisoft project is in development for Nintendo Switch, the images showed, and will star a mix of Nintendo characters and Ubisoft's Rabbids.
The artwork, originally posted to Comicbook.com, shows Mario, Luigi, Peach and Yoshi armed with cartoon-like laser guns, alongside similarly-armed Rabbids cosplaying as the foursome.
Another image details the title's gameplay - a mix of exploration and turn-based combat. Each character will have their own playstyle and weapons to upgrade. There will also be some form of multiplayer co-op.
One picture suggests an E3 reveal and hands-on, before a launch in August.
Fans were quick to share and discuss the artwork on social media, where the selfie-taking Peach Rabbid in particular has gained a fan following.
Ubisoft is yet to comment on the leak.