Robbie is actually lying about Leto's Joker not being in the film, as he'll be integral to the beginning of it. The opening will see Harley with Joker shortly after her escape from Belle Reve at the end of David Ayer's Suicide Squad. After they have fun together, he begins abusing her for no reason. She puts up with this for some time, but eventually kills the Joker in some gruesome and creative way. She decides to destroy him at the place he was created, and the truck in the trailer has his corpse in it instead of him alive. This'll all take place in the first five to ten minutes of the film. Thoughts?