I said this before, and it's a bizarre idea. But what if they did the mask with prosthetics? (sure in the movie it could just be a mask, a cowl, something he throws on over his head)
But behind the scenes, (in the real world), it would actually be prosthetic.
Allowing him an extreme amount of movement in the mask? And to get even stranger...maybe even slight expression through the eyebrows?
Always thought it would be neat to see the mask work the way it does in comics and cartoons.
But I guess that would work better in a more artistic version...like if Zach Snyder got to do a stylized Batman
--dk7