And also why did this need to take place in the early 20th century? Joaquin Phoenix is 45. I don't know what age Joker was supposed to be but that seems about right. That means Joker, in the future when Batman is Batman, is like a 60ish year old man? That doesn't really seem to track. It is meant to mirror the IRL late 70's-early 80's NYC of Taxi Driver. In regards to the age difference between Joaquin's character and Bruce Wayne. It can be seen as one of several indicators that this is not The Joker that will be Batman's greatest arch enemy (though this character may have inspired that Joker to come) and/or there is a point after the subway murders that everything that happens is in Arthur's head. Sort of like Robert Pupkin's story in The King of Comedy. I've never seen Taxi Driver, and yeah that's kind of my point, that it wasn't a Batman movie. They should've just called it/him something else and left out the Wayne stuff and suddenly it's a much better movie. That it takes place in Gotham, in Batman's world, is undeniable. Hell, that they decide to shoe-horn in the Batman origin story pretty much insinuates that it's real. Unrelated it'd be interesting to see a NEW movie/comic/hero franchise to take off from the villain standpoint. Like have a Joker movie that's less origin story and more him terrorizing Gotham in the years prior to Batman becoming Batman, in fact, he's the impetus for BECOMING Batman. As Batman emerges he's constantly criticized "stay down, don't you remember what happened to OTHER HERO" and comics being what they are, the hero would have the constant self-doubt as the big bad villain keeps reemerging. "Have I even made a difference? I can't get rid of this guy! He was the whole reason I'm here"