thinking of possible villains, there's quite a few to chose from. personally, i wouldn't want penguin or catwoman (just yet). here are a few options i could see:
>i think harley quinn would be awesome (especially considering we're just coming off a film that featured the joker).
>i could see Talia al Ghul, seeing how batman axed her dad in the first flick.
>black mask, just because of his hatred for bruce wayne.
>mad hatter? i don't know if the alice in wonderland storyline will appeal to batman film fanatics.
>deadshot. as you said linty, he's not a bad option.
>firefly ... would be pretty cool to see gotham go up in flames.
>holiday ... they are building up the carmone angle, why not include a carmone family member in holiday.
>manbat? as the case with a killer croc (nolan hasn't really been going to mutant/human transformation route - that's more of hulk/spiderman/etc), but batman vs. manbat would be cool.
>if two-face isn't dead they could bring into play Hush and clayface.
...i would love to see freeze/bane/poison ivy, i just think we've seen them recently, nolan would probably like to hold off on that route. i am surprised it's not riddler, because i think coming off the recent joker flick having riddler featured would be awesome.