Another point: Selina has some echoes of Batman: Year One
, which were nice to spot.
I actually want to see this again, but I will wait for the DVD release.
Might even buy the inevitable Trilogy boxset with extended cuts.
Also, this is pretty cool:
EDIT: I forgot that I wanted to bring up some points from previous posts.
The perfect mimic theory, while interesting, does not really fit.
And if we were to choose a more recent, realistic character to pull it off, I believe Jane Doe would trump Clayface.
As for where is the Pit, it was filmed in India, but it's never specified (as far as I remember) where it actually is. Although I guess India is closer to the League of Shadows' HQ, so maybe more towards that option. But then again, as Shadowman said, the chant is in Arabic so maybe not (although this could just be because of the prisoners' language, rather than the location).