Accessing Kat & Emmett without logging onto to PSN

Hello everyone,

I have a question: does anyone know how I can unlock Kat and Emmett on Playstation All-Stars Battle Royale without logging onto Playstation Network? If you have a method, please tell me.

Thank you,

thegrillisreal

P.S. I'm on Rogero 4.30, using a BLES01436 copy of this game. Thanks!