Considering he will be playable in the new missions maybe as a reward for beating it you can play as him in the city.
I doubt it. I looked up a lot of articles and they all said that he would only be playable in certain missions in the new DLC. At least I get to play as him for a bit, but I wanted more and so did many other people. Whatever, Harley's the star and I'm thrilled, but I miss Arlene Sorkin.
ALRIGHT, I'M So..gonna...kill...y...woo, something shiney! It's just me, ADD. *If you are looking for people to party up with, post your platform and basic info here.*
Dear Monolith, please add more villain themed paint jobs. Specifically, a Harley Quinn style paint job, as seen here.