I don't know why but lately I've been thinking about the funnier versions of The Joker, like TAS one, and what it would look like if he used some chips from the Mad Hatter on a device to mind control Superman. For some reason this is what I came up with:

I swear I love TAS Joker's funny pranks too much to not see him doing this.

He'd have him kill Harley for laughs.

That's why Joker is my favorite Batman character, he literally does things just for the laughs. I could see him playing harmless pranks on Superman, if he were in a good mood. Things could turn deadly, though, if he decided he had enough. Remember, Joker became Emperor Joker and had no interest in Superman, so he just locked him in Arkham Asylum. TAS Joker, though, tried to kill the blue boy scout, because he wanted cash. The most likely turn of events would be Joker using Clark to get to Bruce, though; he might turn him into a super-powered version of Joker. It would be a classic Joker move to have Batman fight one of his good friends. Like in injustice, the clown could also have Superman do unsavory things to the people closest to him.