AP Photo/M. Spencer Green
In an interview with the magazine (which is where Flynn used to work before becoming a best-selling novelist -- ah, dreams do come true!), the author said: "Ben [Affleck] was so shocked by it. He would say, 'This is a whole new third act! She literally threw that third act out and started from scratch.'" Now what this means, exactly, is hard to say, both because it's impossible to speculate and we don't want to dip into spoiler territory.
Considering the film is being directed by David Fincher, who has had two movies in which the lead characters leap to their own demise and another in which the apocalypse is framed as a fairy tale happy ending, our money is that he and Flynn have come up with something even more devastating than the one in the novel. Which is really saying something.
Regardless, "Gone Girl" remains our most anticipated movie of the new year, which means the wait until October 4 is going to be especially grueling.