Take another look @ leaked set footage from "Suicide Squad", revealing Jared Leto as the 'Joker' slapping Margot Robbie as 'Harley Quinn':
"Suicide Squad", aka "Task Force X", debuted in DC Comics' "The Brave and the Bold" (vol. 1) #25 (1959) then revived in DC's "Legends" #3 (1987).
Click the images to enlarge and Sneak Peek "Suicide Squad"....