The Dangerous Finding

Joker and Harley split, that's old news

What's not, is that they continued to live. Harley moved away from Gotham, kept to being a mercenary, wether she can spell it or not. She's got a partner in crime, and they have a daughter. Rylan who wants to follow in her mom's footsteps.

Joker however never left; besides causing mayhem wherever he steps, after a one nighter, he now has a son. Eli, who knows of his heritage even though his mother has tried to keep her son from the life of insanity and crime