You can't hide anything from the internet. Someone has snuck their video camera into a Resistance 2 beta playtest and uploaded the spoils for all to enjoy.
Blurry as it may be, the footage shows a pretty lengthy chunk of the sequel, tackling the Chimera in the new American setting.
Looks pretty good, and so it should considering the game's due out before the end of the year. There are two videos check out, one here and the other (better one) here. Be warned; you may hear some swear words.