The Joker film was a major success and won an Oscar.
Leonardo DiCaprio's potential involvement in Joker was reported in 2017 but unconfirmed.
Joaquin Phoenix ultimately played Joker, not Leonardo DiCaprio.
DiCaprio has avoided superhero and fantasy roles.
He was previously linked to Batman and Spider-Man.
Martin Scorsese's involvement as a producer led to DiCaprio speculation.
Todd Phillips confirmed Phoenix was always intended for the Joker role.
DiCaprio has a successful career and advises against superhero roles.
As of now, He has not appeared in any superhero or fantasy films.