User blog comment:Drgyen/Insomniac confirms Resistance 3 demo will be on Battle: LA on blu-ray/@comment-220.255.1.167-20110510101350/@comment-1275506-20110511092150

Plus the movie was distributed by Columbia Pictures, which is owned by Sony. Although I hadn't seen the movie I \Wikipedia it and hear from Spill.com which rated as corny and more of a promotion of R3 according to the latter.