Like this Imdb user, I'm PISSED that they cut out the vampire subplot for the script. That was the best part! Aarrgh..., Guinivere Turner missed a lot of the dark reality at the heart of American Psycho, too. Poor Bret.
"According to Fox News, Ellis and Jarecki had spent three years working on a script and prepping the film for release, and Jarecki was set to direct. The film was supposed to be "an absurdist, lighthearted, and expansive satire." When producers replaced Jarecki with Australian director Gregor Jordan, the tone of the film strayed away from Ellis and Jarecki's original premise to become something that the cast and writers were embarrassed of. Amid concerns about the budget and about sex and violence (much like that of Ellis' earlier adaptation, American Psycho), the vampire subplot was excised from the movie entirely along with actor Brandon Routh, who played a vampire. Jordan's final movie, which has been critically reviled, became "some terrible, dark meditation" under his interpretation of the script. Jordan also reportedly cut the script down from Ellis' original 150 pages to only 94.[1]
"It's hard to tell now, but it was supposed to be like criminals and vampires and girls and young people. There were things I recognized, and a lot that I missed. But it's the director's version of the script, and that's just how it is." -Bret Easton Ellis on The Informers.