Semiotics

All media promotions, whether it be for film or television, tell you what you need to know before watching the film or show. The creators of these media promotions do this through denotations and connotations.
Here is the promotional poster for one of the biggest action/superhero films of this year and here are the denotations and connotations of the Avengers: Age of Ultron poster.

Denotations: you can see the Avengers all standing together in the foreground of the poster, clearly displaying their individual talents. In the background you can see flying robot like creatures, trying to kill the Avengers.

Connotations: The Hulk, Iron Man, Captain America and Thor are clearly portrayed larger than the other Avengers which tells me that they are the more important characters in this film. As well as that they are going to be crucial to the film's storyline. Quicksilver and Scarlett Witch are pictured in the far right corner which tells the viewer that they are a recent addition to the Avengers team. This means that they are not a fully-fledged member of the team which could lead to the isolation and separation of Scarlett Witch and Quicksilver from the rest of the Avengers team throughout the film.

A further connotation of this film is that you can see a blurry figure hovering above the Avengers in the distance. The outline of him shadowed by the sun gives him a godlike presence which suggests he is important and powerful. Also, the fact that he is above the Avengers tells me that he is both more important and more powerful than the Avengers.
In the background you can clearly see robot like figures flying towards the Avengers which tells me that they are trying to defeat the Avengers. However, the godlike figure that is seen hovering in the air appears to have none around him which tells me that he is ruthless and an ally of the Avengers team.