NeoGAF has posted shots and a PDF for a game rumored to be in the works at Slightly Mad Studios called Biker Bash.
According to the PDF, it's in development with Gamagio for PSN, Steam, Wii U, and XBLA.
Looking over the document, the game is described as a "bike racing game that combines classic gameplay from titles like Road Rash/MotorStorm with modern fighting mechanics from Street Fighter IV/Fight Night and drags it kicking and screaming into the 21st Century with next-gen graphics, gameplay, and social features… all at a downloadable price point.”
The game looks to include both single and multiplayer modes in both LAN, split-screen and online configurations.
The document also lists various combat options, power-ups, varied locales, a "grabbing and lock-on mode", and a meter which shows the amount of rage a player as attained.
While the game hasn't been announced, it could be a proof of concept or something the studio is shopping around. Until then, consider it a rumor until confirmed.