The problem I've seen with making this mask is the side pieces are insanely detailed, but when you wear the hood it will completely obscures that, so I opted to create it without the metal side pieces.
The rest of the costume will consist of a coat and a black hooded sweatshirt. The coat was made for me by someone else. I think it turned out really great..
I may try to make a full instructable showing how to make the mask, but I didn't have a lot of time, as I made this for a party in Vegas I'm going to.
Update: I've included photos of the coat, and completely redid the mask ask well. Chin piece came out a bit strange, but I think it's quite an improvement over the old version.