For the sake of box office, now piecing together is very popular ~ "Freddie vs Jason" is a typical example. It was precisely its popularity that spawned the trend of combining incongruous movies, such as the stories of vampires and werewolves - "Underworld". Maybe there will be more, then we can make a movie about Wong Fei-hung battles Fong Sai-yuk, or even a four-way battle between Jackie Chan, Jet Li, Yuen Biao, and Donnie Yen!