I was thinking of using that pic at one point... but (at least in the avatar) the Joker looks a bit too strung out... Like he's been on a 3 day coke binge, and has had Harley poking his anus at regular intervals with a sharp stick.
I was also thinking of using the cover to LoTDK 50, With the joker holding the joker kitty!
But, along came Wonder Woman #96, and all was well.