#1 DC's 'Joker' Character
This entry may be crossing the boundaries a bit since Bray Wyatt's evil alter-ego (The Fiend) in WWE could have drawn inspiration from the Joker that is portrayed in the comics, as well as various iterations of the Joker from the silver screen.
When The Fiend debuted on the main roster, WWE fans noticed a similarity between The Fiend's mask and the New 52 version of the Joker from the comics.
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Kyle A. Scarborough, who came up with the concept illustration for The Fiend's mask in WWE was asked about these comparisons by CBR. Scarborough said the following on this topic:
"Clearly it gives off the New 52 Joker vibe, but that's on me. The mask is as much Joker as it is Leatherface or Hannibal Lecter. I personally am a massive Batman fan. Have been all my life, so in my head it clearly feels like that New 52 iteration, but we all knew full well that wasn't what we were making."
From Joaquin Phoenix's portrayal of the titular character in Joker (2019), many have pointed out the similarities in Arthur Fleck and Bray Wyatt, both being cast out from society before they became the Joker and The Fiend, respectively.
While that may just be a mere coincidence, The Fiend's recent storyline with Alexa Bliss took an interesting turn when their chemistry drew comparisons to Joker and Harley Quinn's infamous relationship.
The current DCEU landscape has popularised Harley and Joker's connection amongst moviegoers as well.
Towards the end of August, Alexa Bliss may have foreshadowed the future of her WWE storyline with The Fiend by posting an edit of herself as Harley Quinn on Instagram, linked above.