So, I found this image in one of "Arkham City" game archives.
You can see, it is Harley, and the image has name "Story_DLC", it was in archive with menu images.
Maybe it is going to be post-story DLC, or it was cut from the game?
There's also quite a bit cutted (or new DLC) material, like some trophies (Mad Hatter Thug, Reporter, Unmasked Batman e.t.c.).
What do you think?
Here are this trophies:
I rendered this by myself:
Clayface with Talia's texture (it was in archive, edited to fit him, sooo...):
Mad Hatter's Thug:
And this two I'm too lazy to render:
Unmasked sick Batman:
They are little messed up, but the point is clear.