EDIT : They didn't push it back, I thought they had.
The Neighborhood Watch marketing campaign began on February 29, 2012, with the release of a teaser poster, trailer and the unveiling of the film's website, jointhewatch.com.[39] On March 27, 2012, it was reported that 20th Century Fox had the poster and trailer removed from Florida theaters in response to the increasing controversy concerning the shooting death of Trayvon Martin in Sanford, Florida by neighborhood watch captain George Zimmerman. The trailer featured Hill, imitating a gun with his hand to pretend to shoot at teenagers, while the poster featured a bullet-ridden, alien-themed neighborhood watch sign. According to insiders, Fox intended to move into the next phase of the marketing campaign as soon as possible, focusing on the film's science-fiction aspect, while replacing the previous posters with images of the cast.[40][41] Fox maintained that the July 27, 2012, release date would remain unchanged by the Martin case or the marketing changes.[42]
In a statement about the changes, Fox said: "We are very sensitive to the Trayvon Martin case, but our film is a broad alien-invasion comedy and bears absolutely no relation to the tragic events in Florida
these initial marketing materials were released before this incident ever came to light. The teaser materials were part of an early phase of our marketing and were never planned for long-term use."[40] The new alien-focused campaign began on May 4, 2012, with the release of a new trailer, coinciding with Fox changing the film's name to The Watch, to further distance the film from the Martin case