I tried making the background of the first poster a bit more subtle, and took off the transparency effect of the blood.
This is another poster idea I had for Walking Dead. I think the message here is pretty straightforward. The series takes place in Atlanta, which has been overrun with the walking carcasses of zombified humans. The flies here are doing what flies tend to do--hang around death & decay. I accentuated the ominous red background with some screened-back blood "rain."
These are the two "critique-worthy" versions of the posters: