I remember watching Return of the Joker and being so sickened by what the clowns did to Tim that I as much as I love the characters, I was like, yep.. time for you guys to die. But I still wasn't really a fan of the ending where Harley is a grandma and disapproving of her granddaughters hanging around with a faux Joker gang. Just seems like she didn't deserve the happy ending.
Here's the drawing Timm did about that ending situation....