- As early as the early 1990s, "Watchmen" began to prepare for the production. The screenwriter at the time was Sam Hamm, and early rumors Robin Williams would star in Rorschach and Jamie Lee Curtis. As the ghost, Gary Bussey as a comedian, and Richard Gere and Kevin Costner's participation. The script was rewritten many times, but in the end Warner Company shelved the filming plan.
- In 2004, the film was ready for shooting, and the director, script and all aspects were ready, but just as it was preparing to shoot, Paramount decided to shelve the filming plan for the film. Soon after, the original director Paul Greengrass retired from the crew and switched to filming "Thrilling Flight 93", and the filming plan was restarted by Warner Corporation, which was already in 2006.
- Both Tom Cruise and Jude Law have expressed interest in participating in the film.
- Michael Bay was once appointed as the director of the film, but he finally refused to direct the film.
- The film's protagonist Rorschach decided to play Simon Peggy at the beginning of the filming, but Simon Peggy rejected the role. The reason he gave was: "I don't want to hear people say'Simon Peggy is Rorschach.' ". ,
- When the film was released, a new comic novel related to the plot of the film was published.
- Terry Gilliam had the idea of making the film into a movie in 1989, but after several unsatisfactory scripts, he gave up the idea. At the same time, he said that the film will take at least 5 hours to make it clear.
- The film’s director Zach Schneider invited illustrator Dave Gibbons to create a poster for the film. The poster design has subtle visual clues to suggest the plot of the film.
- Because "300" was well received, Warner Corporation decided to appoint Zach Schneider as the director of "Watchmen".
Watchmen behind the scenes gags
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Dan Dreiberg: Watchmen are over.
Rorschach: Says Tricky Dick.
Dan Dreiberg: Says me.
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Rorschach: [reading from journal] Rorschach's Journal. October 12th, 1985: Dog carcass in alley this morning, tire tread on burst stomach. This city is afraid of me. I have seen its true face. The streets are extended gutters and the gutters are full of blood and when the drains finally scab over, all the vermin will drown. The accumulated filth of all their sex and murder will foam up about their waists and all the whores and politicians will look up and shout "Save us!"... and I'll whisper "no."