New design

I again added the text to this new picture, but didn't add the overall glow in Photoshop because I knew that I would be editing it again at some point:

I added a large drop shadow to the text this time, which puts it away from the rest of the poster. I thought this looked good.
I also added a 'coming soon' and a slogan for the film at the bottom of the poster.
I am aware that I need to add some more things like a possible credit block and an age certificate at least, but I will add that last for technical reasons with the age certificate.

In terms of the raw picture itself, I added some more blood splatters on the floor, however I may make these look more realistic.