As I’ve mentioned in another thread, there is a special class of film where they manufacture another reason for the title (or overemphasize one reason, excluding all others) because the movie doesn’t make it clear.
The film version of Stephen King’s Hearts in Atlantis actually adds a card game to make the title plausible, but it’s not the reason the book has that title. The Color Purple has Whoopi Goldberg’s voice-over giving a reason near the end, but it’s a mere fraction of the reason the book has that title. I’m convinced the 1960’s Doris Day film Please Don’t Eat the Daisies threw in a song with “Don’t Eat the Daisies” in it so that people wouldn’t ask where the title came from.
Lots of films have non-obvious titles. The winner, to me, is the film Sorceror, a remake of the French film The Wages of Fear. I didn’t understand that title for years (given the visuals seen in the trailer, and the time period, I would’ve guessed it was some Carlos Castaneda-type film, instead of a thriller about transporting nitroglycerine through jungles), until someone on this Board explained that it’s the name of one of the trucks.
The Last King of Scotland has nothing to do with Scotland. Yes, I know where the title comes from. But it’s confusing as hell if you’re unfamiliar with the work.