I posted this as a thread and it was immediately closed, though Im not sure why except that maybe your not allowed to post new threads for a thought, so I figured I would try sharing here and see if anyone has any thoughts.
I think Selina will be an opposite idea of what Dent was in TDK
I think Bane will be a mercenary of sorts hired by Talia to destroy the man who took her father from her. Bane being simply out to destroy Batman both physically and Psychologically, will capitilize on fundemental aspects. I think Selina Kyle will be hired to earn his emotional trust, and truly be there to rob him and Wayne Ent. While Bane breaks batman, Selina breaks Bruce, especially considering vulnerability after Rachel.
Now heres my Dent comparison, Dent was a good guy in TDK till he was corrupted by Joker at the end of TDK. I think Selina is Bruces potential redemption. SOmeone sent to him with evil intentions from the start, but becomes inspired by him, and returns as Catwoman in the end to save him just before Bane finally breaks the Bat.
Nolan is always generally going back to fundamental aspects of each character. Look at Catwomans fundemental traits.
Master Thief (nolan loves big scale Heist situations)
Seductress
In her evolution she has on more than one occasion switched sides from good to bad.
and finally, the Catwoman persona was out of inspiration from Batman.