I brought watchmen off PSN yesterday and after I found out that the Playstation has a parental control PIN which I didn't know and looked through the internet for the master code. I eventually sat down and watched the film to find out that it isn't so much an action packed super-hero film, but more a dark, violent, conspiracy film, which I really enjoyed. The film surprised me at its dark nature and violent, action scenes and its story hooked me through the experience until the end.  
I have know intention on buying the prequel games which can be found on PSN and XBL. The film lasted about 2 hours 30. I think it was a good break from my marathon run of God of War III, which I'm amazed at it's story and twists.