From the poster, it could be suggested that the genre of this film is thriller due to the choice of colours. The poster is mainly black, which has evil and sinister connotations, two themes of the thriller genre. The second main colour used is red. This connotes danger and passion. Both colours therefore support thriller conventions and represent the danger in the film, which suggests the film will include a disruption stage (Todorov), which may excite audiences and therefore interest them into the film.
Having a female character as the only character suggests her power and importance within the film because audience's only focus is on the female character. Her facial expression is also serious and stern, with direct eye contact to audiences. Again this subverts female stereotypes as she is shown fierce and brave.
The names of the main actors are shown at the top of the poster, which helps to persuade the audience. This is because actors, such as Halle Berry, are very well-known and therefore the audience may assume the film is of a big budget, and so they can expect the film will be of good sfx and other interesting elements, because it has the budget to do so, as evident in the use of an A list actor. The billing on this poster is very small as it only contains the production companies and the release date. Having the release date on the poster allows the audience to find out when they can see the film so that they can plan when they are going to see it.