[Discussion] Which movie trailers were the most deceptive regarding the actual content of the movie?

Kangaroo Jack

Kangaroo Jack's premise, trailer, and commercials promise little more than the spectacle of two enthusiastic actors being kicked over and over again by a sassy, computer-animated kangaroo—and, sadly, the film fails to deliver even that.

Feelsbadman

I thought the movie would be about a talking kangaroo. Boy was I disappointed.

Donnie Darko - makes it look like a horror movie

Godzilla (2014) - made it look like Bryan Cranston was the star (right off the heels of Breaking Bad)

Downsizing - made it look good

Godzilla (2014) - made it look like Bryan Cranston was the star

So true. It was quite a surprise watching the movie
- Like Steven Seagal, in Executive Decision? (Which is a great movie)
Downsizing. What happened there? That looked really interesting from the trailer but turned out quite dull.

Bridge to Terabithia.

There have been trailers that contain a lot of missing scenes because they're put together before the final cut off the film has been created.

I remember Josh Trank's version of Fantastic Four features a scene where the Thing jumps out of the back of a cargo plane and lands in a military base. Nothing close to that happens in the film.

Yeah, wasn't the Rogue One trailer an example of this? I recall there was a scene where the main character comes face to face with an airborne tie fighter - the entire sequence was absent from the film. According to the director, the scene had no connection to the story and never had any chance of making it into the film. It was just a visual idea the marketing team really liked.
- Yeah, the director, Gareth Edwards, was like, “What's this!?” And as you say, it was a marketing idea. It is a cool shot though.
  
  The Rogue One trailer's feature quite a lot of deleted footage, especially as there were reshoots to change the ending. Some trailers feature footage of Jinn and the gang running across the beach and if you look closely, she has the Death Star data hard drive in her hand. This is taken from the original end action sequence. There are quite a few YouTube videos that pull out all the footage from the marketing and show what didn't end up in the finished film.

One of the best trailers ever made: The Handmaiden. If you’ve seen the film or know the director, Park Chan-wook, you know it’s anything but what the trailer implies.

I remember Man of the Year being advertised as a straight comedy: Robin Williams plays a Jon Stewart type that actually gets elected president, hijinks ensue.

!It pretty quickly turned into a serious thriller. He didn't even actually get elected, he only won because he entered the race after a program was installed on the electronic voting machines to steal the election for another candidate, and the convoluted conditions wound up favoring him instead.!<

The trailer for Dragon Wars promised me scenes of dragons fighting attack helicopters. This scene did appear in the movie... for about thirty seconds. The rest was an incomprehensible mess of flashbacks within flashbacks and Korean folklore that amounted to very little.