Well DC comics have a Multiverse, so they just created a timeline where Joker is Batman's sidekick.

I am not sure if this is a result of the Box office and Oscars success of the Joker movie.
Oh, In the Harley Queen animated series, Joker is now married to a single mom and he is being a good stepfather to her children. Batman is not his nemisis anymore. His Nemesis now is a Karen named Debbie who is controlling the school PTA.
Losing Harley replacing him with Poison Ivy made him not abusive to his new wife.
Joker is now a Good stepdad:






