"Looper" is a movie with a pretty clever central SciFi concept, based around time travel. The idea is that there is a select group of amateur assassins who work for mobsters in the Future and get rid of people. These assassins are not time travelers, they live their lives in completely linear fashion. Just every day at 11:30 drive out to the Kansas corn fields, a man from the future suddenly teleports before them, and they blow them away. This way future crimes are completely unsolvable, since no body can ever be found, and even if somebody in the present did find the future bodies, they could never identify them since these people do not technically exist yet*. For their work, the Loopers are given a few bars of silver on the victim's back, then they get to run off to the city, take some "Cowboy Bebop" Bloody Eye drugs, and bed prostitutes. However, our hero, Joseph Gordon-Levitt, one day comes across a particularly difficult target: his future self. And worse, Future Joe is ready for him.
The trailers have set up "Looper" as little more than Joseph Gordon-Levitt in make-up fighting his future version, Bruce Willis. Future Joe vs Present Joe. However, there is considerably more to the story, and this is no simple Bang Bang action movie like "Dredd". Its actually a lot similar to Bruce Willis's previous traveling adventure,
Now ultimately in a battle between Levitt and Willis, I'm going Willis here. I like Joseph Gordon-Levitt, he's a fine actor, he was even able to come off as likable in the terrible bland movie "Premium Rush"**, I want to see him back for "Batman 4", but Bruce Willis is Bruce Willis. Its unfair to have them fight. The movie was still very good entertainment so see it.