It appears Insomniac won't be making another Resistance game after R3.
Here is a sample of the interview:
Gaming Union: "Insomniac seems pretty busy at the moment - Ratchet & Clank is going strong, OverStrike is on the way, etc.. Is Resistance still your flagship franchise? Where does the series fit in the studio's future plans?"
Marcus Smith: "As far as Insomniac goes... you're right. We've got three different games with very different focuses. We're kind of going in a lot of different directions. Ted Price, Alex and Brian Hastings, the owners, have been doing this for a long time - something like 15 years of doing Sony exclusive games - and they're just interested in doing other things."