Bane spent most of his childhood in prison.
He went under an experiment which had killed all others. He did not die. But he has to take the drug (venom) every 12 hours through that mask you see. As a result of the drug he is very strong. The venom give him enormous powers. He is the one who 'broke the bat' (broke batman's back). He knows about batman's true identity as well.
I was not in any fan connection with Batman , but then i played Arkham Asylum. Really i enjoyed so much and he became one of my fav heroes. Then i watched both Batman Begins and Dark Knight and became a fan..
As for Bane i know him due to Arkham Asylum.
After Avengers, this is the only other movie I am excited for this year. I won't be able to go to Hyderabad to watch it in IMAX but doesn't matter...I watched a super-crap "print" of TDK when it came out..just for the sake of watching it..
He's on story and production for Man of steel too(directed by Zack Snyder), EXCITED!! But I'm shocked the filming was already finished and it will be in post production for about a year! Wonder how good the effects will be