Complex: "Sony revealed last month that PlayStation All-Stars: Battle Royale will soon receive two free new characters in the forms of Emmett from Starhawk and Kat from Gravity Rush. And last night at Sony's Santa Monica studio, we got the chance to test those characters out before their release."
I wasn't sold on the roster to warrant a purchase. I know these characters are free but I'm pretty sure the rest won't be. They will most likely release a "Ultimate" or "Super" Edition in a year or so with the all the DLC and will pick it up then.