anyasis of film posters

These are two very different posters for films called 'Immortal' A and 'Expendables' B of the same genre action/adventure. The simiarity for each of them are they both include a contrast of very bright and very dark colours these include black. They also have the title of the film on the bottom of the poster. They also both have an explosion in the background behind a group or individual person.  The differences are that one of the posters A is of a old setting while the other B is much more of a modern setting.