John Constantine is a man who has literally been to hell and back in the Warner Bros. Pictures film Constantine, a supernatural thriller based on the long-running hit DC Comics/VERTIGO HELLBLAZER graphic novels. When Constantine teams up with skeptical policewoman Angela Dodson to solve the mysterious suicide of her twin sister, their investigation takes them through the world of demons and angels that exists just beneath the landscape of contemporary Los Angeles. Caught in a catastrophic series of otherworldly events, the two become inextricably involved and seek to find their own peace at whatever cost.
Some of the characters look nothing like they do in the movie. Ditto some of the backgrounds/sets.
Some of the best moments in the film were distilled to a mere 2 squares in the comic and lost all impact.
But finally, they took a film that I enjoyed, have watched several times, and squashed it into something that lost all of its charisma, fun and entertainment.
So my take away was just: don't bother. Just watch the film.