The only thing I can think that would make Harley Quinn and the Joker's relationship MORE messed up is if children were added to the mix.
One of the most popular fan theories surrounding the film right now is the criminal couple, Harley Quinn and the Joker, either already have kids, had kids but lost them or will have kids in the next film.
What's the evidence? Well, the obvious one is that scene where Harley literally envisions herself having two children with the Joker.
So, that's one pretty strong hint.
The second hint, though, takes a sharper eye to notice. Remember that scene from the trailer where the Jokes is happily lying in his circle of weapons?
Well, if you look closely, you'll see some baby onesies in the corner of the shot.
So, um, if they DO have children already, things aren't looking so great for them. Does this maybe mean their children died?
Hear the whole theory explained in this video from Virtual below:
We wish those kids the best of luck!