The ESRB website has what might be a listing for a new installment to the Ratchet & Clank franchise. Ratchet & Clank Future: Quest for Booty is listed as in development for the PlayStation 3, although we aren't sure if this will be a sequel or an expansion.
Its been given a Everyone 10+ rating, and will feature Fantasy Violence along with the use of alcohol.
We have contacted Sony for comment. More on this soon.