Red 2

Does he have a martial arts background, or did the producers of Red just decide to make him a kicking fool because he's asian.

I'm not too sure, probably military related background judging by the trailer

I think all males in South Korea serve a time in the military (correct me if I'm wrong). He's used some martial arts type fighting in a couple of his other movies, not just the American ones.

ETA: I'm wondering how many lines he has in this one. He speaks English fairly well, but he didn't speak in the trailer.