There is clearly no consensus as to how the Joker became the Joker, but this is also kind of the point. The film is, at this stage, reportedly focused on an earlys Gotham City with a hard-boiled crime feel. Gunfire punctures a hanging container, and he is drowned in antidepressant chemicals—completing his transformation into the Joker. The boss arranges for Napier to be killed at a chemical plant, and things go awry when the police—and Batman—arrive. A source told IGN that Scorsese's involvement has not been officially ironed out just yet.