I was ecstatic for this movie back when Stephen Chow ("Shaolin Soccer," "Kung Fu Hustle") was attached to star and direct the film. Chow is amazing playing a lovable jerk and I could see the potential chemistry between him and Seth Rogan — who's playing the title character.
But I don't know about Chou. First and foremost, he's a singer, not an action star. And his acting resume is pretty light — starring roles in "Curse of the Golden Flower" and the incredibly underwhelming "Initial D" come to mind.
Personally I'm disappointed the producers decided against going with an American actor of Asian descent for an overseas Asian actor. Why pay more for an established actor overseas who has had limited visibility in the states instead of possibly finding a hidden gem here.
