It's no secret that intellectual property is one of the most important commodities in Hollywood. The top 10 grossing movies of 2023 internationally were all either sequels or based on books, video games, or toys.
One of those films, "Guardians of the Galaxy Vol. 3," was the final installment of a much-beloved trilogy of superhero films. It was a huge hit with critics and fans, making $845 million worldwide.
But that's the best-case scenario.
Just as often, a series will be let down by its final installment or audiences find it didn't need to be turned into a trilogy at all. In one case, a series wasn't even supposed to be a trilogy, but the third film performed so poorly that the fourth film never materialized.
Here are the worst, most unnecessary trilogies in movie history.