It won't be Insomniac Games developing the recently announced Resistance title for NGP / PSP2. They're busy with Resistance 3, Ratchet & Clank: All 4 One and the unknown multiplatform title they're working on with EA. Instead it will be Nihilistic Software doing the honours. Insomniac congratulated the new Resistance developer over Twitter. Nihilistic Software are thereby furthering their involvement with Sony as they are also working on Playstation Move Heroes for Playstation 3.
Resistance on NGP won't be a simple port, but it will be a first person shooter in the vein of Insomniac's titles. The developers of the first portable Resistance title, Resistance: Retribution, are currently working on Uncharted for NGP.