Although nothing has been announced, it looks likely that NetherRealm’s DC-crazy fighter is coming soon to your PS Vita. A rating for the game on Vita has been spotted on Germany’s USK rating board.
Siliconera has the spot. So it’s likely you’ll be smashing Batman in the face while on the go very soon.
NetherRealm is well-known for supporting its games long after release. There’s been a steady stream of new characters since release, and a balancing patch for Injustice has just been released. You can expect the same kind of treatment for the Vita version.