Watchmen is one of the best graphic novels ever created and Alan Moore's best work. It was originally published in USA in 1986. I bought it when it came out here in 1989 and it's one of my all-time favourites until today. If you like dark, intelligent and complex comic stories, read it now. You won't be disappointed.
If the movie takes another direction, changes the story or leaves out key parts like "Tales of the Black Freighter", I'm not interested. Honestly, I'm not really interested, even if the movie turns out to be good. I never understood why so many people want to have comic books as movies. Some are decent, many are horrible, all are redundant. But that's just my opinion.
I'm afraid there will be "Sandman - The Movie" very soon, but I'm glad that - thanks to Mr. Watterson - there will never be a Calvin & Hobbes movie.
