The game's director Omar Kendall hinted at a Vita port in a recent interview with Digital Trends.
Asked whether a handheld version was in the works, Kendall responded by saying: "Maybe… Stay tuned."
He also promised a strong showing for the game at next month's E3 event in Los Angeles, hinting at additional character and environment reveals.
"We're going to be announcing characters and environments and all that from now until the game comes out. I think E3 will be really informative for people with questions about our roster."
PlayStation All-Stars Battle Royale was officially announced by Sony last month.
The game is a mascot-filled brawler similar to Nintendo's Super Smash Bros Melee. Rumours of its existence intensified after a domain name was registered by Sony.
Confirmed characters include Fat Princess, Sly Cooper, Colonel Radec from Killzone, Parappa the Rapper, Kratos from God of War and Sweet Tooth from Twisted Metal.
It will offer single and multiplayer modes, including support for up to four players locally, as well as a number of online tournament options.
The game has been in development for the past two years, and is scheduled for release later this year.
Watch a trailer for PlayStation All-Stars Battle Royale below: