I don't think catwoman is ready to be taken out of the bag yet. (strangely, there was no pun intended as i typed that) But i also think Nolan would think himself clever enough to bring her out. Although I'd like them to just stop. You've got 2 badass villains and 2 more films, leave it there. The Dark Knight already has 3 confirmed villains (although the villainy of scarecrow and two-face is yet to be known) and a possible 4th with Anthony Michael Hall. (That seems to be the rumor, although i think he plays a certain misguided D.A.'s assistant, his cryptic hints can certainly be interpreted that way) I think this Batman series has much sturdier a foundation than spiderman but i still don't want to see it do the bad-guy juggling act we saw fail in the third iteration of that franchise.