In a recent interview with developers from Insomniac Games, they were asked about things they had to cut from Ratchet & Clank Future, which results in them giving some interesting hints at Ratchet & Clank Future 2.
To quote: "There were certain things in the story, characters that I wanted to address more in this part of the story arch that we're not going to address until a later part of the story arch. And more of the background with the Lombaxes and what happened to them. It's things we hint at. The Zonie and the history of the Zonian and who they are."