generating ideas

I've started creating some initial thumbnail sketches trying to gather ideas on subject matter and composition. A lot of the posters I'd seen for the actual film were very contrasty and dark, appropriate considering the films nature, and I am trying to go for a similar thing here. Choosing a subject matter has been particularly challenging however, as the original posters featured the plain old characters and nothing else. I've taken a different approach here and made my examples more relative to the film's title and storyline including things such as a graveyard, zombies and their crashed plane, all of which are viable ideas. At present, I'm leaning towards creating a more scenic model of the exterior of the mansion they come across and the surrounding environment of shrubbery and jungle. I would've ideally liked something more symbolic and typical of zombie films, however since the zombies in this film feature no gore, blood or torn clothing etc like your stereotypical ones, I'll have to shift my focus more towards the storyline in this instance.

Currently I am leaning towards having a stereotypical zombie representing the film, but I need to be careful how I approach that as the zombies in the film aren't of your typical nature; they don't feature torn clothing, blood, uncomfortable sounds etc, so I'll carry on presenting ideas for now and see where it goes from here.