Some would argue Willem Dafoe exceeded his original appearance as Green Goblin in Spider-Man: No Way Home. The actor's performance has led many to believe Dafoe would be a great Joker - and it's a role Dafoe is definitely interested in playing.
Dafoe spoke to GQ Magazine about his idea for a Joker movie, which would also involve Joaquin Phoenix's iteration.
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Willem Dafoe Pitches Playing a “Joker Imposter” Opposite Joaquin Phoenix
Dafoe's idea would involve two Jokers. One would be Phoenix's version, while the other will be an imposter played by the Green Goblin himself.
Dafoe further explained his vision and said the two fiends would be imitating and trying to one-up each other:
The idea certainly goes in line with the 2019 film's psychological analysis of Arthur Fleck, and exploring Phoenix's influence on regular people and the eventual creation of another Joker has plenty of interesting possibilities.
Dafoe also highlighted his affinity for playing villains, mainly that portraying bad characters is somewhat "fun":
Joker 2 was immediately greenlit following its billion-dollar box office tally and an Oscar win for Phoenix. Details regarding its development have remained minute but, Dafoe's tale could certainly be a possible premise for the sequel.