For my senior thesis in 2015, my class and I had to select a certain topic and create material for it, including a trilogy of movie posters for three different films (each one from an individual decade) that, upon first glance, had nothing to do with neither the thesis topic nor each other; the posters also had to connect to one another visually, too.
The thesis I decided upon was memory. I thought long and hard about something in movies that relates in memory and something that seemed irrelevant to it at first.
Finally, I decided upon ghost stories because ghosts/spirits are nothing more than memories of deceased people preserved into places or things.
The posters connect visually by means of a series of red, pixel-like boxes, containing vector illustrations and photographic recreations of elements from the respective films.