This poster shows superman, which we know is him due to the colour scheme of his attire and more importantly the fact he is flying. As well as this we see his logo, which all though a distorted image confirms its him. As superman is such a well know character it is hard to to mistake the character for someone else.
Anyone familiar with the this character will know its an action film, even if they don't the poster makes the genre very clear due to the blurred background showing he's moving quickly (most likely flying). presenting a thrilling action film. He also appears to be clenching his fist, which could be inferred that he is ready for a confrontation, meaning it is definatley and action film.
