The Man of Steel poster shows the main character (Superman) flying above a city at a high velocity (demonstrated by the blur of the city in the background). The genre is relatively well represented as a super hero-action film, as Superman is flying over a city at a great speed, this demonstrates the over-grandeuse special effects which super hero films are famous for. The genre is also accentuated by Superman's stern expression, while he is flying through the sky, is expression should be much lighter, however it seems as if he has a large weight on his mind and is ready to fight.
The main unique selling point is the fact that it is another superman film, therefore the movie will already set itself out from other superhero films as the superhero is already very well known and has its unique, established fan base. the poster makes this very clear that it's a superman film by displaying the colours of the franchise.
The location of the poster is a large metropolis, this shows that the movie will be set in a heavy urban setting, this suggests that the film will be eventful and exciting, as cities in general are known to be hives of activity and crime. The motion blur in the poster further shows this, as it demonstrates Superman's power and speed. It also shows Superman's superiority over the city, as he is passing it by without paying it any attention
I personally believe that this poster is not particularly effective at attracting the audience to watch the film as it gives almost nothing to the viewer in terms of the Revelation of the genre, It does show superman, which admittedly implies that the film will be of action packed nature, however there is no real implication of the events which may transpire within the film, Even the flying can easily misconstrued to be jovial rather than a demonstration of power.