Great news! We can check out playstation all-stars about a month to its release. It debuts on the american psn store on the 16th and the uk store on the 17th for the vita and 23rd for the ps3, unless you're on playstation plus in which case you can download it on the 16th. Fortunately, i have a vita (and a ps3) and just enough left on my swift data plan so i can download tomorrow. In this beta;

You’ll be able to play as Kratos, Sweet Tooth, Colonel Radec, Sly Cooper, PaRappa, and Fat Princess.
You’ll be able to play in both the Metropolis and Hades stages.
You’ll be able to try out four-player online tournaments and 2 v 2 online tournaments. For the 2 v 2 games we’ll be supporting friend invites, so you and a friend can fight another team online.

Make sure you get on when you can -- the beta ends October 30th.

I gather the game has cross-play between the ps3 and the vita, looking forward to kicking all your butts. My psn id is kayshow180, look for me.