From AnalogHype.com: "Retro City Rampage will be available on the PlayStation 3 and Vita in just two days! With a roster teaming with all-star characters such as Splosion Man, and Super Meat Boy, it'd only make sense to add in a few characters! Earlier this evening on the PlayStation Blog, Rey Gutierrez announced that Sid Shuman, Jeff Rubenstein, and himself would be joining the cast of Retro City Rampage as easter eggs!"
It's perfect for the Vita!
Because, 'Dyad' comes to mind?