So wie ich das verstanden habe ist Moore einfach gegen das Medium Film bzw. der Meinung der Film kann niemals die Geschichte so wiedergeben wie es nötig wäre.
en.wikipedia.org/wiki/Watchmen_(film)#Moore_and_Gibbons
Moore felt that, contrary to others? opinion, the comic book was not cinematic. When he was approached by Terry Gilliam on how to film the comic book, Moore stated, "I [don?t] think it [is] filmable"
In December 2001, Moore further explained his opposition, citing how a reader can take the time to absorb the character backgrounds, by having the option of turning back the pages so that they can connect elements they had just read to past elements, but that film forces you to watch the story at 24 frames per second
In Moore?s opinion, Hayter?s script was the closest anyone could get to the original comic, but added that he would not be going to see the film when completed. Moore said, "My book is a comic book. Not a movie, not a novel. A comic book. It's been made in a certain way, and designed to be read a certain way: in an armchair, nice and cozy next to a fire, with a steaming cup of coffee.
Moore signed a deal to go uncredited on the film, and for his share of the income be given to Gibbons, as he had done on V for Vendetta.
Moore expressed discontent over the choice of the director, saying that he "had a lot of problems" with the comic book 300 and that, while he had not seen it, he had heard that Snyder's film adaptation was racist, homophobic, and "sublimely stupid.
Gibbons believed watching the film on DVD would emulate flipping through the book, with viewers pausing or rewinding the film to catch details.
en.wikipedia.org/wiki/Watchmen_(film)#Moore_and_Gibbons