On their official you tube channel, Eidos and Avalanche Studios have created a multi-path trailer, though I cant see it just yet. Hopefully you'll get the choose the ending or something.

With complete freedom to take on the Island of Panau from any angle, a mission in Just Cause 2 is never quite the same twice. So when Jade Tan, one of the Agency’s key operatives in Panau, falls into enemy hands, how you get her back really is up to you. To give gamers an idea of the choices available in-game, we have created an innovative multi-path trailer on the Official Just Cause 2 YouTube Channel (at www.youtube.com/officialjustcause2), allowing fans of the game the choice in how Rico’s rescue plays out. Use your grapple and parachute to go in stealthily, coming in from the air and grappling guards out of towers; or go all-guns-a’blazin’, destroying everything and anyone in sight? Take a jeep and ride it down a mountainside or use an aerial bombardment of rockets from a hijacked helicopter? The choice is yours, and each clip will give you a different taste of the high-octane gameplay that will make Just Cause 2 one of the stand-out titles of 2010.