Twilight- There are three main characters centred at the top and are captured close up, whereas, the villains are in a smaller shot beneath them suggesting that they have less power than the main characters leading us to believe there is a reason as to why that is.
John Wick- We can see the dominant signifier who in this case is the main character of John Wick taking up most of the poster, there are also some sub signifiers in the background which are also characters in the movie.
Terrifier- This poster is a sign as it made of the key components which are the signifier aka the printed poster itself/physical existence and something signified which in this case, is the idea that this is film is more thrilling than others.