Ratloop must be pretty pleased with the success of the first Rocketbirds encounter with the Vita as a sequel is on the way, announced at an indie developer meet-up in Japan. The trailer is pretty brief but shows off the game's beefed-up PS4-friendly visuals. Top soundtrack too, if this snippet is just an example of what's to follow.
Also announced for the Vita was Infinita Strata, which I'm pretty sure has nothing to do with Infinite Stratos, being coded by cutesy puzzle and RPG house office5656. I'd have thought the Japanese would be more into indie Vita games, especially with the growing mobile dominance and ease-of-porting from Unity, but perhaps it takes longer to get things going over there.