“When developing Injustice on Vita, our primary goal was to make sure it could hold its own next to its console counterpart,” says the announcement on the EU PlayStation blog. It goes on to say that the studio “pulled out all the stops to push the PS Vita as hard as we could” to make this version of the game faithful to the original.
The Vita version will include ad-hoc multiplayer, traditional multiplayer over wi-fi, and will add touch control to Story Mode and some S.T.A.R. Labs Missions. The Ultimate Edition means both the Vita and PS4 game includes all of the game’s DLC.