UPDATE:
Sony registers Vita domain:
http://whois.domaintools.com/battleroyalthegamevita.com
Source
Sony registers Vita domain:
http://whois.domaintools.com/battleroyalthegamevita.com
If the LinkedIn C.V of Sony employee Robert Krekel is anything to go by then SuperBot Entertainments PlayStation All-Stars: Battle Royale is also in development for PlayStation Vita.
Robert, a sound designer with SCEA, lists PlayStation All-Stars: Battle Royale for PS3 and Vita under Current Project. Roberts previous projects include Starhawk and Uncharted 3: Drakes Deception.
Source