Please help with the name of this movie.
I asked the other day, but I don't think it's Enter The Dragon. My buddy said he saw it, and Bruce Lee is not in the movie we want. He thinks its more a samauri movie. It has a master who trains his blood son, not sure the ethnic backround, and he also teaches his adopted son who is american. They learn about Light and Dark. They go seperate ways and the blood son gets involved in crime ring over seas like blood sport. They kidnap The american adopted son's financee or g/f and he has to fight to save her. The half brothers fight each other, using Light/Dark they were taught and in the end realize together they were better than seperate. Pretty sure it was in 80s.90s. Not positive, but it was a popular fighting movie, pretty sure it was samauri-ish. Thanks for any help with this name.