Hardy was pretty decent in RockNRolla. I think he's been tagged as a legit up and comer.
I think Bane has been misrepresented in most appearances outside his origin story The Vengeance of Bane. He's very smart; a mirror opposite of Batman who was born in a Third World prison and trained himself (much in the same way Bruce Wayne did) after hearing of stories of Batman from American prisoners in the prison. He pumped himself up additionally by taking Venom....a kind of super steroid that a young Batman dabbled with ( the Legends of the Dark Knight story Venom). I actually think the powers that Bane did the Bane story a little better in the villain Prometheus (
Prometheus )...so I'm kind of hoping they go with a combo of the two...rather than the straight Bane story. I also think it'd be a bit extraneous to go with the Venom subplot and instead just extend the theme from the first two ( that of the changing of the villains of Gotham from normal criminals to crazies influenced by the appearance of Batman).