10. "Corporate Headquarters" - Star TrekJ.J. Abrams is a director who renowned for keeping the details regarding his projects as close to his chest as possible. That's difficult, considering that he makes some of the biggest and most high profiled movies in Hollywood. Naturally, Abrams used a fake title to try disguising his big screen Star Trek reboot. In fact, other crew members used various other fake titles for their particular units in order to make the production as confusing as possible for snoops. However, a full year before the release, Trek fans had pieced together enough clues to find out what he was up to.
9. "Group Hug" - The AvengersMarvel regularly uses fake working titles, but often makes them easy for fans to decipher the truth. Iron Man 2's working title was "Rasputin," recalling the Russian origin of the main villain, whilst Captain America: The First Avenger was codenamed "Frostbite" - a nod to the character's fate at the end of the movie. Thor: The Dark World? Titled "Thursday Mourning," a reference to the God of Thunder himself. But perhaps Marvel's smartest fake working title was the one they used for The Avengers - "Group Hug," a reference to the gang of famous heroes coming together in one film. Aw.
8. "Incident of 57th Street" - Harry Potter And The Chamber of SecretsThe second Harry Potter movie used the working title "Incident of 57th Street" to disguise the production from its increasingly rabid fanbase. At first glance, the title seems like it was chosen completely at random. However, the title has taken inspiration from the Bruce Springsteen song "Incident on 57th Street," a track on his second album. So second Potter movie, second Springsteen album, perhaps?