Recently, I went and saw the movie Wanted. I had read that it was based on a comic book (as many movies these days are). I enjoyed the movie. About the same time, I ended up buying a copy of the actual comic book on which it was based, in order to see exactly how close the movie was to the original comic book. It's a good thing I saw the movie before I read the comic book.
The comic book and the movie are nothing alike. The name of the movie, the names of a few characters and the first few scenes were the same, but that's it. Everything else is a completely different story. In the movie, they are a 'Fraternity' of assassins that 'kill one to save a hundred'. This makes the characters almost sympathetic. The comic book, however is a completely different story. The comic book tells the story of what happens if all the supervillians in the world won. It is a very dark and adult story. Basically, the hero of the movie is a supervillian in the comic book. This book is not for kids! With various villians with such names as 'Shit-Head' and 'Fuckwit' this is not the thing you want your kids to read. It's a dark story, but an interesting one. It is fun to read because they make not so subtle references to well known comic book characters and what the villians did to them when they won. Despite the graphic nature, I am enjoying the story.
All in all, I'd say both the movie and the comic book are enjoyable, but they should be considered two very different stories.
Also, if you go see the movie, watch for a little inside joke in the last scene of the movie. The writer of the comic book is named Mark Millar. The artist is named JG Jones. In the last scene, you will see a office cubicle with a very visible name tag that says 'JG Millar'. This is a reference to the writer and artist of the original comic book...