4. Fantastic Beasts: The Crimes of Grindelwald

This franchise already had enough going on with all the repeating characters and concepts, but then the merch department took things to a whole different level. Credence’s identity and family lineage were set up perfectly for a huge reveal, except character descriptions and merch materials spelled out the twist before people could put 2 and 2 together by themselves. Imagine being spoiled by a random collectible card. That has to feel awful.

5. Harry Potter and the Deathly Hallows

Frankly, this one’s both big and insignificant at the same time. When it comes to trailers, it’s all about teasing the audience and making them want to see your movie. But this one trailer showed a little bit too much, even though it was just a couple of seconds. We saw Harry surrounded by his dead loved ones, including Remus Lupin, who was still alive in the previous movie. It’s the kind of spoiler that reveals a lot, but only if you don’t miss it in the trailer.

6. Cast Away

If you came in blind, you’d definitely be on the edge of your seat the whole time. Will he survive? Will he ever get home? You wouldn’t know. But thanks to the trailer, Cast Away’s most critical scenes turned into “Meh, he’ll be fine in the end,” making you feel like you’re just watching the process.