One of this spring's big Nintendo Switch games will be Mario + Rabbids Kingdom Battle, a game that has been rumoured for quite some time and does indeed exist, as confirmed by art assets provided to Kotaku. The game will mix Nintendo's iconic plumber (and friends) with characters from Ubisoft's popular Rabbids series.
Although the person who sent the assets asked us not to share them, they corroborate the existence of a bizarre crossover RPG that's currently scheduled to come to Switch in either August or September. Ubisoft is developing Mario + Rabbids Kingdom Battle on the publisher's proprietary Snowdrop engine, according to the assets we've seen. The game's selling points appear to be a) turn-based combat, b) two-player local co-op, and c) a goofy sense of humour. (The art we've seen features Mario and crew wielding laser beams.)
The game will apparently have eight playable characters: Mario, Luigi, Yoshi, Peach and, bizarrely, four Rabbids dressed up as Mario, Luigi, Yoshi and Peach.
The existence of this Mario and Rabbids crossover was first reported by Laura Kate Dale, who became infamous over the past year for running various rumours about the Switch, including some correct specifics on the hardware. Although many of her software rumours turned out to be false, Dale nailed this one, and it's likely we'll see Mario + Rabbids Kingdom Battle at E3 (unless Ubisoft decides to announce it earlier).
Nintendo and Ubisoft did not immediately respond to requests for comment.