i wouldnt suggest a devil may cry movie, but i would suggest a MGS movie. or a final fantasy movie in which they actually use swords and not guns unlike in the fina fantasy movie:spirits within. (also not talking about FF7: Advent children<---seen it, friggin awesome, its all i have to say about it)
Almost any kind of fighting game Dead or Alive, Soul Calibur, Marvel Vs Capcom, etc. Maybe Final Fantasy might make a good movie. I haven't played any of these games but I have seen music videos of FF10 or the new one after it. Or even FF8. Games with diverse characters and an interesting plot and these games seem to have it.