During the Gamescom Sony press conference, it was announced that Sack Boy, Ratchet and Clank, Spike and Dante (from Devil May Cry) would be joining the roster of PlayStation All-Stars Battle Royale. This is the biggest reveal we've had for the title so far, not surprising considering that there's already been a fairly big leak concerning the title.
The characters were revealed in a short trailer during the conference and no doubt each character will get their own trailer over the next couple of days.
They also announce Cross Buy, a new scheme that allows anybody who has bought the PS3 version of Battle Royale will get the Vita game for free. Other games available in the sceheme is Ratchet and Clank QForce and the new Sly Cooper.