Help me find the name of this movie!?!?!?!?

This is the only description i can give you so i hope you can still help me out. Ok so all i can remember is that there was an asain guy (like jackie-chan) and i think he was married to a girl. And all i remember is that a twin/clone of him (which he is very bad) i think tries to kill him or something like that. I also kinda remember the ending, it was one of them that got sent to some underworld or whatever and like he's on a hill and monsters or stuff are going after him trying to kill him but since he is a good fighter he is kinda defending himself pretty well. Anyways the movie goes back to the one who was on Earth and just shows him with his wife but the trick is is that you dont know which on got sent to the underworld. BTW they are both good fighters. Hope you can help me out!!