I'm just going to say The Dark Knight Returns was INCREDIBLY DISAPPOINTING. I came in excited, and struggled to stay awake between fits of laughter at the most ridiculous scenes. What a bummer ending, dude.
You know really they could have made an entirely new character for the New 52 Harley. Instead of revamping her entirely and calling her Harley they could have made that unrecognizable blue and red costume (really these colors clash, what were they thinking?) belong to a new character, and they could have done new things with her, and then they could just not touch Harley or keep her how she originally was. I can understand revamping because the stories got old and the characters needed to be modernized, but Harley is a fairly new character in the DC world. She didn't NEED to be updated, revamped, and redesigned, because everything about her was already modern and there was never a whole lot about her in the comics as it was. Nobody had a chance to get tired of her old design before they turned it into an awful Halloween costume. Her background and design were revamped too soon in my opinion.
Joker isn't really capable of loving someone I think. And Harley doesn't deserve that kind of abuse. She could kick Joker's ass if she didn't love him xD I think they could work only as well as we've already seen. They get together, Harley gets fed up with almost being killed and being unloved, Harley misses Joker, rinse and repeat. I may be biased since I really like the idea of Poison Ivy and Harley as a couple </3