I have some possible theories from what I've heard about the movie and seen from pictures. Obviously it's probably going to be in some kind of gas form, but I'm wondering where it's stored and how he activates his mask, and most importantly, what do you think happens? I've noticed that in ever picture of Bane he seems to be wearing some kind of wrist guard, and if you look at the back of his neck, there is a huge scar going down his spine. I'm guessing that he's had some kind of surgery and has a tube going down the side of his spine, that is somehow activated by this wrist guard, and transfers the venom to those two tubes on either side of his head. In the prologue he says it would be extremely painful if he removed his mask, so I'm guessing it's surgically attached to his head, so he can't remove it. Which brings up my next question... How does he eat? What do you think?