What is folding?
Insomniac Games, creator of the alternate-history FPS Resistance for PS3, tweeted its congratulations to Nihilistic Software, the apparent developer of the series' NGP incarnation (which was revealed in a promo reel of in-development games for the handheld during PlayStation Meeting 2011). Insomniac confirmed in a followup tweet that the title would be a "brand new Resistance game. Not a port."
While Insomniac has handled all of the Resistance console iterations, including this September's Resistance 3, the well-recieved 2009 PSP spinoff, Resistance: Retribution, was developed by Sony Bend. With Bend currently linked to the Uncharted NGP game, however, it seems Nihilistic got the call to carry on the Resistance for the PSP successor.