The Ivy storyline would make for an interesting one for potential character growth. Ivy, always being the one in control in any situation, would eventually raise hell on the guards. But having the tables turned on the character forcing her to see things from the other perspective (being the rapee instead of the raper) would harken back to her origin with Jason Woodrue and her captivity in Fruit of the Earth, both in which she was the one being controlled.
So, yeah, the Ivy one.
Harley, Ivy, and Catwoman decide to get together and have a threesome, but it secretly gets videotaped and they become the most famous celebrities in Gotham
or
Bruce finds on the phone bill many, many, many calls made to 1800-WeAre18 by Alfred
In my dream, the world had suffered a terrible disaster. A black haze shut out the sun, and the darkness was alive with the moans and screams of wounded people. Suddenly, a small light glowed. A candle flickered into life, symbol of hope for millions. A single tiny candle, shining in the ugly dark. I laughed, and blew it out. - Joker