As part of Harley's backstory, the Joker is dead.
We also talked about the idea that some of the Batman Begins / The Dark Knight events may have happened, though maybe with some tweaks: can we also assume that Ra's al Ghul, Harvey Dent, and Sal Maroni are also dead?
I'm going to add a category on the character list for people that are dead, for reference and what-not.
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