Harley Quinn, Black Canary, pregnancy, Harley Quinn has four-year-old daughter with the Joker. This story line results in Harley realising how abusive the Joker actually is - she ends up friends with Black Canary.
For anyone who somehow still thinks Harley Quinn and the Joker are a good couple. You're fucking idiots. The Joker is the worst thing that ever happened to an incredibly kind woman, and she's finally realized it.