a charming/brutal british bane played by Hardy would be AWESOME.
in my eyes Bane does not have to be latin american nor a steroided out freak to work...
He just needs to be well, the evil version of batman.
He and Hugo strange can have very similar goals in TDNR if used correctly (Bane wants to end batman to take over gotham while strange wants to study and become batman in his nutso mind. hugo can be working for the GCPD with and hires Bane to take down the Bat but doesn't realize Bane has grand ulterior motives of his own)
throw in an ambiguous catwoman who plays both sides but ultimately helps bats in the end, and we could have a roller coaster of a movie.
My only fret with hardy as Bane is his height. I believe he's only 5'9 or so,which wouldn't be a problem until he is face to face with bale which in that case thats what apple boxes are for.
and hardy CAN get big. he doesn't need to be Thor size to do the part justice.
being a nolan move, bane will probably be in a suit for most of the film until he is fighting batman, which then he dons the "bane mask" and in my mind a "sleeveless" Batman type costume.(being a nolan film, i dont think bane will be in a luchador type or wife beater outfit but a swat type suit made for battling the bat)
just my thoughts