Exposition: The Enemy of Plot
I just decided to watch Dark City and in the first 10 seconds I knew it wasn't the version I saw so many years back. It was the theatrical version that literally spoils the entire mystery before they establish there is one. Apparently it was studio mandated, but rightfully removed from the Directors Cut.
It got me thinking about other movies that open with scenes or narration that arguably shouldn't exist.
Predator shows the spaceship arriving on earth. Without that shot the viewer has no idea what is hunting the boys until it's literally shown to them.
The Thing also shows the ship, though it's crashing. Without this shot the mystery isn't ruined unless you speak the same language as the helicopter pilots.
Blade Runner removed a ton of narration that even Harrison Ford objected to, though it was for most of the runtime in this case, not the opening. We still don't need to hear Dekkards inner monologue telling us how he feels. And the original ending is quite different too. No spoilers there, but worth a peek if you're interested.
What are some other movies that come to mind are guilty of these "crimes"?