'Many art experts say Lichtenstein’s use of source comics was fair appropriation. Yet Eisman, 96, who lives in New Jersey, tells The Washington Post by email: “I’d say it’s theft.” He hopes people will watch the documentary and see it as evenhanded, intended to represent both sides with the aim to let “the viewers make up their own minds and not just leave it to the so-called experts.”

https://www.washingtonpost.com/comics/2023/04/05/roy-lichtenstein-documentary/