It's going to be $15 DLC ($39.99 if you want to buy the disc version). For $15 you get 5 new characters, 6 new stages, balance updates. Coming to PS3, 360 and PC
5 Characters are:
5th character will make it's debut in a SF game.
With this trailer, Insomniac announced later after the teaser that they are making a new Ratchet and Clank game called Ratchet and Clank: Into the Nexus. This will be like the old games like the first game, Going Commando, Up Your Arsenal, Tools Of Destruction, and A Crack in Time. This game will be $29.99 and will release later this year.