Joker is full of Easter eggs and references to the world of DC.
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Such as this font nod to Batman: The Animated Series.
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The Hidden Easter Eggs twitter account has now pointed out this image of Batman's cowl.
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There is some debate as to whether this is a genuine find or a happy coincidence.
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Joker is certainly a film with incredible attention to detail, especially with cinematography.
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And the scene in question would've been framed very deliberately.
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But then virtually everything in Joker is up for debate.
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