The main actor is the guy you can barely see in the back on the poster

First thing I thought when I saw the poster - and the dude from Terminator who is the only face is nowhere to be seen

Yeah, clearly they used Silva to get people to watch the movie. It does look dumb seeing the poster now I've watched the movie, as Silva looks like the main character.

Mr. Laurio, never trust a beautiful woman. Especially one who's interested in you.

Agreed! But if you want to sell this movie to MMA fans, you better put Anderson Silva, Lyoto Machida and Krzysztof Soszynski in front instead the unknown Cody Hackman (who is the main actor)

Prostitute: What the *beep* are you doing?
Johnny: I'm gonna kill a bunch of people.