The various "Styles": When developing a film poster, there is usually more than a single style. Often, there is one poster that emphasizes a single aspect of a film such as the action, and another style that emphasizes the romance between protagonist or some kind of secondary element. One style can be assigned to a single poster size and depending on the film's distribution budget, and if the film is going to be a wide/saturation run, there can be numerous variations of film poster for the same movie. This concept was conceived around the 1930's with Paramount using "Style A, Style B" and Universal using "Style Y, Style Z"
Review Posters: After a film has a pre-release screening for film critics, a review poster is sometimes released to the public to advertise a film's positive reviews. Contains more text than a standard poster with little to no artwork. They are easy to identify but nowadays, quite rare.
Above we have an example of two different styles of film poster for the same movie. Note the different dimensions of each, hinting at different locations for each poster style, and the colour palette for the two posters being different. The first uses neutral colours and a blue sky background; as opposed to warm colours, a red title, city backdrop and three (armed) characters in view. This is done to appeal to different aspects of the movie: the first being returning protagonist, the second being action.
If I was to develop more than a single style for my own film poster, I would ensure that each one has a single aspect to advertise and they are inherently different in some shape or form.
This is an example of a review poster. Much less artwork than usual, and constructed mostly by text, this is a creative way to advertise any positive reviews a film may have had during post-production and pre-release exhibition. Once the early viewings to the journalists has been concluded, the film is then rolled out to the public, along with a small collection of review posters based on what was said by the journalist's (positive) feedback.
This may be a somewhat unique way to present my feedback on early drafts of my trailer or other A2 production work. However, as these posters only contain positive reviews and often leave out other criticism, creating a review poster may be somewhat non-representational.
To summarise, the different styles, sizes and purposes of each type of film poster can be important to consider when creating one and these will all contribute well to my finalised film poster.