Prometheus teaser so much promise and not only was it a nonsensical movie with horribly written and acted characters, it didn't even include scene from this trailer or anything close to it.

Dark Knight Rises was when I decided to start avoiding trailers as best as I can. They showed the best part of the opening scene, with the plane dragging the hull of the other plane through the air..

I remember sitting in the theater that whole scene pretty much knowing what was gonna happen. And when it did, instead of being blown away like anybody should be, I had basically no reaction.

Every Zach Snyder movie.

Star Wars the Force Awakens. I remember being super toked when the trailer came out. The movie it self was a B- at best.

Suicide Squad. Trailers were good, Purple Lamborghini was good track. Everything looked good in trailers. And I saw a movie. Jared Leto as Joker was stupid, film was boring with few good scenes you saw in trailer. Waste of money and time. I know that there are other Suicide Squad movies, Harley Quinn movie. I haven't seen them and probably I won't see them

Wonder Woman 1984 Top notch trailer and terrible movie, that I even not have watched to the end.

This might be controversial, but for me it was Watchmen.

I was really into the graphic novel when the movie was announced. They dropped this trailer with Smashing Pumpkins "The beginning is the End is the Beginning" playing over it and it was so good. Perfectly captured what I felt the tone of the graphic novel was. Gritty, forlorn, dark, contemplative.

https://youtu.be/wdiHDzT6YbQ?si=K6WoxVts0ZGzSb28

I must have watched that trailer 100 times before the movie came out. Then I saw the movie and it was weirdly campy and totally the opposite of the feel the trailer gave in a lot of places. Which in turn was very different from the feel I got from the graphic novel. I was so disappointed. I've never gone back to rewatch it, and I probably should because I think the consensus was that it's a pretty good movie and being more than a decade removed from reading the book might help me appreciate the movie on its own merit a bit more.

Sucker punch.

Prequel trilogy. They get you excited.

For me it was Wonder Woman 1984. I thought the first one was pretty good and the trailer for the second looked like it was something I was going to enjoy.. I was wrong

Scorcher VI - Global Meltdown. All I remember is the trailer, can't even remember the movie.

9 - https://youtu.be/UY7Tge7ftxM?si=lvcFJXg0hdctoUc8

Pearl Harbor. I remember getting super jazzed for it, and then…. Well the movie speaks for itself. F.

How to train your Dragon 3

The trailer(s) had a lot of interesting twists and cool cutscenes, new characters, new "lore" elements ... all the good stuff that makes the audience curious for more. Well, it turned out that the trailers spoiled ALL the important plot elements, so the actual movie had basically no extra content other than filler scenes. If you had seen the trailer, there was no need to see the movie.

Sucker Punch.

Maybe it's just me, but after watching 300 and the trailer I thought it was going to be some full on adventure story with badass women (which I get in some ways it is).

Just to be the only person sitting in the middle of the cinema (me a fat dude) watching women being subjected to abusive or sexual content for like 2 hours :/

Just didn't expect it all.

Drive with Ryan Gosling. Trailer made the movie look exciting but it was more of an artsy film.

Million ways to die in the west had every funny joke in the trailer. There's no point seeing the movie after that.

No question. Man of Steel. The trailers with each dad is something I go back to and watch TO THIS DAY. It screams of a movie that I wish I could see. So much more with inner turmoil of who The Man of Steel was. I wanted to see the Kansas boy's roots. sigh ....

/edit just got downvoted, but I'll add more anyways. The movie we got seemed a bit confused. It felt like a lot of style and little substance. I love Cavill though. I also enjoyed the Krypton portion even though a lot of people didn't.

For me it has to be all the trailers for the first Suicide Squad. So well executed and somehow stole the show away from the equally as promising Batman Vs Superman. That Comic Con was probably the most optimistic DC's future looked in the past decade.

My fun little canon is that the actual movie doesn't exist and the trailers are a very stylized prologue to James Gunn's The Suicide Squad. It gives backstory to some of the main characters (Flagg, Harley, Waller) and their motivations while also teasing characters who may or may not show up in potential sequels

https://youtu.be/PLLQK9la6Go?si=V3HNYcOzET4uujVk

https://youtu.be/CmRih_VtVAs?si=iL-1CTtz7NaFLRk8

https://youtu.be/7NHtV4bfs6Y?si=G_nRwb5wPbIrGYJO

Any movie by M. Night Shyamalan.

That Godzilla that made it seem like Brian Cranston was a main character and then he died like 10 minutes in.

Shallow hal had a great funny trailer but after watching the movie they used pretty much all the good bits in the trailer.

Matrix 2 was a huge disappointment... Still remember how I knew after 15 minutes of watching the movie that it sucked.

Suicide Squad

Surrogates, remember that one?

little me fell for Fantasia's trailer like it was going to be the best Disney/Gisnep movie ever, only yo find out it was a scary musical before I knew what was "trippy"

Triple 9. Amazing cast, great (red-band) trailer, ok movie.

Tree of Life: very intriguing trailer with one of the most beautiful tunes ever (Bedrich Smetana's Vltava). The movie turned out to be a slog. With dinosaurs.