Carrie

Film adaptations of good (and sometimes awful) novels have always been an easy go-to for Hollywood to churn out a film without having to come up with original ideas.

Terminator fans were left angry when one of the series' biggest twists, and possibly this year's biggest film twist, was needlessly revealed in a trailer.

Was this the worst 'reveal' in any trailer ever? We've had a look at some of the most unnecessary trailer reveals that ruined films for waiting fans.

When you're onto a good formula, why would you let anything get in the way of your delivious cash cow?

Keep on churning out those trailers, even if none of the writers, cast, directors or producers are involved in the follow up.