Spoiler:
No way, Harley looked way better in Arkham City.
Here's an idea Havok. How about putting them together in one? His outfit will be based on his 52 version, while he has the long hair, beard and hook on his left arm.
Oh, and that scene pretty much reaffirms to me that if they do decide to put Joker's ass in Injustice, he had better be voiced by Mark Hamill
No one else