a) The movies don't stick to the plot as in the game
b) It will be an American movie and that means NO GORE! well no real gore. They won't allow a fatality in a movie EVER! Like Scorpions spear fatality or Hotarus leg grab and slam fatality.
c) They won't have normal cast
d) They will probably use some stupid acceries in the movie like that fake ice in MKA.