Well, this isn't MK related, but it's one of my wishes to have a movie based on another popular games, Diablo (Blizzard).
I really like how they did the ancient warriors in Lord Of The Rings, so LOTR would be one inspiration I think a filmmaker could use to make the movie Serious and Scary!
Then, I would probably get ILM to do the special effects on Diablo, and monsters in the world like how they did the Dinosaurs in Jurassic Park, and character Transformations, FX.
Actors, is the Hardest to think of who would play the Barbarian, Paladin, Amazon, Sorceress,Necromancer, Druid, and Assassin.
(If I am making this movie, I would use all the characters in Diablo 2, including the expansion, instead of just 1, 2 or 3.)
If you like Diablo games as I do, please speak! :)