I like this as a minimalist concept for a poster. Take all the object, props and vehicles from a movie and make it into a memorable shape from the film. In this poster for Raiders of the Lost Ark, the artist PosterAuthority, has chosen the less obvious, “The Headpiece to the Staff of Ra”.
It took me a few seconds to realize what I was looking at and that whole time I was thinking why didn’t they shape this thing like the Ark. But once I realized what they were going for it made the discovery that much more rewarding.