Nolan seems more about realism in his movies and a super steroid freak like BANE in the comics wouldn't work in Nolan's mind
If you ask me, the best version of BANE they could ever do in a non-cartoon movie, would be based on CGI with JOSH BROLINīs voice, but just forget about screening a pro-bodybuilder or someone as anorexic-looking (compared to the original BANE) as Tom Hardy is looking like.