Actually the cartoons do Banes voice pretty good. Bane never had a mouth piece, ever, he wears a Black mask with a white mark on the front. Bane has a Spanish accent from being born in South America. Also, they completely ignored the hose connected to the back of his head that feeds him Venom, the drug that makes him who he is. Complete cluster **** on Nolans behalf. Read the novel Batman:Night Fall...it explains everything you need to know about the Bane vs. Batman angle.
it's supposed to be a "real-life" interpretation of the batman series. WTF is Nolan supposed to do with venom.
Nolan clearly explains what the thing on banes face is.