FX has decided to pick up American Psycho as a series that will stand as a sequel to the film.
"While the original novel, and film, depicted the Patrick Bateman character in the stockmarket boom of the '80s and as a critique of the yuppie subculture, the sequel is said to follow Bateman in modern day America where he finds a protégé and sets up a sadistic social experiment to turn them into his equal."
Patrick Bateman is suppose to be in his mid-50's in this series which should clear up a few things that left you scratching your head about the ending.