Concept art for screenplay

Aspiring screenwriter needs artwork to promote screenplay for crowdfunding. My name is Paul Franco from Austin, Texas and I have completed a screenplay based on a scary story my father used to tell us around the campfire. It was about him when he was a private in the Army and he had to fight a one-legged goatman. Do you think you could create a piece that depicts this? The art would be displayed on the social media and crowdfunding pages to promote the short film. The image would have to be of a modern US soldier on one knee with a large combat knife in one hand looking up to this goatman that is about 8 feet tall. It would be kind of dark, but light projecting from the side.