It's on!? But is it an adaptation of the book or the movie? They are quite different in key ways. Most people I know who love it have only seen the movie. I saw the movie first but read the book later during my backpacking trip through South America in 2003. The book is much more graphic than the movie; I imagine the musical will be even more sanitized than the movie was but will still draw adoring crowds of bankers who fail to see the satire and clamor to look into the mirror it holds up to their lifestyle.
It has been too long since I've read the book, so I don't recall which scenes from the movie were lifted straight from the book, but I can't help but picture one of the musical numbers in this movie being a trio sung by Patrick Batemen and the two prostitutes he's paid to participate in a 3-way