In November 2014, the Sony Pictures computer network was compromised by a group of hackers named Guardians of Peace, disabling many computers. Later the same week, five of Sony Pictures' movies were leaked, including some not yet released (such as "Fury" and "Annie"), as well as confidential data about 47,000 current and former Sony employees. Film historian Wheeler Winston Dixon suggested that the hack, which exposed the inner workings of the studio, was "not a pretty picture," and served as a "wake-up call to the entire industry." The hack also revealed some other documents, emails between Hollywood moguls referring to Barack Obama's cinematic tastes, a possible partnership with Marvel Studios for the inclusion of the superhero Spider-Man in "", which was later confirmed in February 2015, amongst others. On December 16, the hackers issued a warning to moviegoers, threatening to attack anyone who sees "The Interview" during the holidays and urging people to "remember the 11th of September 2001". On December 17, 2014, Sony cancelled the previously planned December 25 release of "The Interview" in response to hacker threats.