Better Editing

After some more editing, I managed to create a fairly real-looking pool of blood.
I tweaked and tweaked and got the right colour, along with a 'diffuse glow' effect in Photoshop.
Below is the final edit of the photo.

I am happy with how I have made the puddle look like blood, I now just need to add the appropriate text and captions to the poster, along with a final bit of editing, and I will have a film poster!