Warning! Spoilers ahead for The Killer.

David Fincher doesn't rule out the possibility of a sequel to The Killer, saying "Never say never." Netflix's The Killer tells a complete story and ties up most narrative threads, meaning a sequel isn't really necessary. However, the ending leaves the door open for a follow-up movie and the popularity of the film means there could be interest in seeing the story continue.

The Killer director David Fincher addresses whether The Killer 2 will happen. Released on Netflix last week, Fincher's latest thriller sees Michael Fassbender starring as a nameless assassin, whose carefully organized life slowly falls apart after a job goes wrong. The film, which serves as a reunion between Fincher and Se7en screenwriter Andrew Kevin Walker, has been met with positive reviews from critics, and has become a major streaming success on Netflix.

Now, with The Killer's ending having left room for more story,...