Into The Blue

From this poster we can tell that the film is set in or at least near the sea which may be attractive to some people. We can also expect the sea to play a heavy part in the film due to the title 'Into The Blue' and the subtitle 'Hold Your Breath' - which also suggest that at least some of the film involves an underwater struggle which may intrigue the audience.
The two attractive models on the front of the poster may be an instant eye-catcher and hold the attention of the poster viewers.
From this film poster we can also expect the film to include some amazing scenery. We can tell this from the beautiful sunset in the background and deep-blue sea at the footer of the poster.
In the background of the poster, looking into the distance we can also see a helicopter which grabs the viewers attention int he way that something such as a helicopter would not normally be included in such an environment. In turn, this makes the audience think about what the story may involve and so they will want to find out what the sotry actually entails.
In the foregorund, the viewer will be able to see a speedboat which appears to be travelling at speed due to the splashback and so from this the viewer will be able to expect some rivetting action scenes and perhaps some hard chases which is a concept and feature of films which will attract a large target demogrpahic of action-genre lovers.