creating demonized/zombie characters

Ok so something has come up that unfortunately is going to put my night elf town on the back burner for a little bit. I was recommended by a friend to join a small team to help make some characters for a horror themed project. Have to  design three characters to be done over the next several months.

Recently started the first character. This is nothing more than a quick mock up/silhouette of the character to begin with. I made a base mesh and kept the poly count low in Maya that way I can get the maximum number of subdivision levels in zbrush. As of now with this character, I can bring this subtool to about 19 million polys, so I pretty much hit my goal. Anything over 20 mil and my computer usually crashes.