It was only a matter of time before we saw an HD collection of the Ratchet & Clank series. To the best of my knowledge, Ratchet & Clank is the only major PlayStation exclusive franchise that hasn't yet gotten a spiffed-up compilation package.
That will probably be changing soon, if a listing on Amazon France is to be believed (since removed). The site put up a listing for a Ratchet & Clank HD Collection, although no other details about what comes inside were provided. However, a launch date of May 16th was slapped on the page. Interesting.
As of right now, take this as a rumor. Although, the chances are quite good that a Ratchet & Clank collection is on the way in the near future. We just have to wait for Sony's official confirmation at this point. It should also be interesting to see which titles from the series make the cut, considering there are six games outside the "Future" line that debuted on the PlayStation 3. Will we just be getting the original PS2 adventures, or will Sony threw us some of those PSP classics to boot? Time will tell.