Perfect Movie! I gave 9 because of potential wasted. It could be revolutionary in superhero movies. Joaquin is outstanding.

Rating: 9/10 (9 October 2019)

Yes, Todd Phillips said that this Joker has nothing to do with the Joker from Batman.
This is just a delusion from mentally ill person in Arkham State Hospital. Everything started when psychotherapist said Arthur that they won't meet again, and when Arthur stated that he won't be able to get the medication.
When Arthur stopped taking medications, everything started. From murders, Sophia, Murrey, Thomas Wayne, everything went to hell after that. At the end of the movie, psychotherapist is smiling at him. If he did everything he did, she won't be smiling.
I expected character development close to Walter White. Mentally ill loser (Walter was physically ill) starting to snap because of injustice and torture. When he is Arthur Fleck, he looks normal from the outside, but he isn't from the inside. When he is under make up, he gets self-confidence, because he is someone else at that moment. After years of self pity and injustice, a moment happens when he feels someone's fear of him. And more he brings his own justice, he gets more confidence. And as movie goes, he became lost in his own view of justice. He started from someone like Walter White and became Heisenberg. More he feels it, more he likes it. He became what he is, because he believe justice is what he think he is, not what society tell him.
Joker could be the hero of the poor, Robin Hood who steal happiness from rich people, not only money. Batman is rich, he is the opposite to Joker. That's way Joker has so many people with him. It could become a movement, like Anonymous in modern times.
I always hated superhero movies, because it never had depth in villains minds. Why do they do what they do?! Give them a reason. People did terrible things in the past because of political or religion view of life, twisted view of justice. Give him a reason to believe he is right. It could be revolutionary in super hero movies. Create villains that people could understand they nature.