There’s speculation that PlayStation All-Stars: Battle Royale is Vita bound, because Sony registered a Vita domain for it. This could also just be cyber squatting. [Gaming Everything via Inside Games]
PlayStation
The more the merrier.
I'd say its an absolute certainty to be on the Vita. A game based off quick bursts of play, on a portable console.
I think I'd buy a Vita this year if LBPK and PSASBR Vita versions are released this year.