Insomniac Games is indeed developing Resistance: Fall of Man 2 (no, not Rise of Man, as some people have created) tentatively scheduled for release next November. Aside from the first and last level, the game takes place entirely in the United States, where someone who may or may not be Sgt. Nathan Hale (who plays a role in the story) has to deal with the Chimeran invasion of the US in such places as San Francisco and Chicago. And there is a cliffhanger ending that sets up for a third title. Vehicles will be included in multiplayer this time around, one will be able to take to the sky with three new vehicles or boogie it down on the ground with the three vehicles from the first game's Campaign.
Sourced via Kotaku.au http://softrockhallelujah.blogspot.com/2007_10_14_archive.html