Talia would fit well into the lore of Nolan's Batman. Catwoman, in her thieving, non-feline incarnation would be ok, too. Quinn's backstory is too liked to the Joker, and they would have to recast him, something they will be wary to do so soon.
I agree Weisz would be a great Selena. I can live with both Knightley or Portman as Talia.