This film has considerable strengths, as I will be the first to admit. Overall well cast with well-done action scenes--there are serious problems.It is so incredibly nonsensical at times that it almost ruined the film for me. For example, the plot device used to get Kirk onto the surface of the ice world so that he could have some alone time with a certain veteran actor was simply preposterous. So about 20 minutes of the middle of the movie made me ready to give up on it.
The Watchmen is dark, at times overly gory, laden with violence, nudity, and moral ambiguity. If you don't like that kind of film, stay away. However, if you are willing to look past the silly costumes and tolerate the gore, you will find a level of philosophical speculation lacking in other "hero" films. I'm not meaning to say that this movie has great depths, but there is quite a bit more than one is accustomed to encountering in Hollywood films of any type. What is the nature of humanity? The role of technology? What is murder? The truly moral choice? All of these are questions that could be chewed over at length after leaving The Watchmen.