If its awesome, thats because of Steven Chow being awesome, and hooray.
Chow being a producer doesn't change the fact that he is neither writing nor directing the movie. He has no input whatsoever on the actual content of the film. James Wong was chosen by Fox, not Chow, to write the script and direct. In fact, the only thing I've really seen Chow do in regards to this film is recommend some HK actors for the cast (I don't think he even has enough creative control to cast the movie on his own, hence Justin Chatwin, James Marsters, Texas Battle, and Emmy Rossum).
If by some miracle this movie doesn't suck, I'll think differently of James Wong, but I sure as Hell won't be crediting Stephen Chow with any success this movie may or may not have.