Student or Learner
Should I say "I see the film Star War" or "I see the Star War film"?
Which is more natural with native speaker?
The "Star Wars" saga includes six films. Since only one was actually called "Star Wars" you could say (if you wanted to admit that you had done so) "I saw the new Star Wars film" to mean you had seen the most recent on in the series.
However, if there is only one movie with that title and it's not part of a series, it would not be natural to say "I saw the Descendants movie." You would, as bhai says above, say "I saw the movie 'The Descendants.'"
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.