PlayStation Move Heroes, a game we played last year, is the first PlayStation game to bring lots of characters from Sony games together.
Nintendo does this kind of thing all the time with Super Smash Bros, Mario Kart and various Mario sports games. Sony usually keeps its icons separate. They're crossing their franchise lines with PlayStation Move Heroes, though, putting Sly Cooper's crew, Ratchet & Clank, Jak and Daxter all in one game. That's certainly more promising than mixing, I don't know, the Cool Boarders people with Wipeout and ... the Battle Arena Toshinden brawlers? That wouldn't work.
PlayStation Move Heroes requires players to use the PS3's Wii-like Move motion controller in a series of challenges that I might call mini-games but that the developers have shown are, well, large-ish mini-games.
Watch the video I shot of the game last year, if the trailer doesn't answer all your questions.