DocWhiskey said:
You are correct. She wouldn't be in a Batman movie if Joker wasn't there. But frankly, Joker shouldn't return JUST for Harley. Harley's not that good of a character. She just compliments the Joker really. And I don't want The Joker recasted just so we could see Harley. That's silly. If Ledger were still with us, I wouldn't mind Harley being in Batman 3. And if Nolan put her in, I'd imagine her more like Azzarello's take on her in "Joker".
But I know Ledger's Joker captivated everyone, but trust me, there's other Batman villains out there that are just as good and could give us a damn good movie.
You're right of course... It would be stupid to bring back The Joker just for Harley Quinn. I would've liked to see her in Nolan's Bat-Universe though.
Anyway, like you said, there are a bunch of other Batman villains to use...
Sadly some villains won't be usable because they are simply over the top...
I don't see Manbat or Clayface in a Nolan Batman film for example. It would kill they entire 'believability' established in the previous films... Things could look like Spider-Man 3 pretty quick
I also don't see how they could re-invent The Penguin after what Burton did with him in Batman Returns without copying too much. After all, the fact that Cobblepot is a deformed human left for dead by his parents and raised by penguins was an idea developed for Batman Returns. Before that, The Penguin was just a chubby little fellow with a top hat who talked funny.
Same goes for Catwoman, in fact. Also done to perfection by Burton. They've already tried to reinvent her in her own movie and failed. Trying it again in a Nolan film is risky business.
What's left then?
The Riddler maybe... He was somewhat OK in Forever but I reckon he could be dealt with in a better way in Nolan's universe. Besides, the origin has already been set by Nolan in The Dark Knight.
And then there is Black Mask. He could work too.
What about The Riddler and Black Mask together against The Bat?
Yeah, I could see that happening.
Either that or Egghead and King Tut!