Two Steps from Hell - Kogan.. is the music of.. could Arthur Fleck (Joaquin Phoenix) .. turn out to be none other than... Jonah ... Wonder Woman's friend and employee, Jonah... is Arthur Fleck (Joaquin Phoenix).... and he became the Joker in the Astral Plain of his own mind because he ... out of horror .. out of his personal horror for Wonder Woman's serial-killer spree.... and Todd Phillips's / Joaquin Phoenix's movie 'Joker' .. once executive produced by Scorcese.. before Scorcese departed.. 'Joker' is actually.. a prequal .. the story of Jonah.. Jonah Arthur Fleck (Joaquin Phoenix).. a prequel to the 14 hour or 16 hour, Wonder Woman movie directed by Scorcese....

https://www.youtube.com/watch?v=FsAeAVfwDFM&list=RDEO_ZvZWLV3M&index=8