Apparently, everyone in Hollywood returned from this past weekend with the burning desire to shift around their release date calendars. Following Monday’s scheduling shuffle for Summit’s Ender’s Game and Paramount’s The Dictator, Warner Bros. has just decided to push back its Ben Affleck thriller Argo by a few weeks — which wouldn’t really be a big deal, except that Argo‘s new date bumps Ruben Fleischer‘s Gangster Squad off the calendar altogether. More details after the jump.

According to Variety, Affleck’s Argo has been moved from September 14 to October 12, pitting it against the Kevin James comedy Here Comes the Boom and the Weinstein Company’s limited release of Paul Thomas Anderson’s The Master. Affleck’s third directorial effort is a fictionalized telling of the ambitious rescue of six U.S. diplomats during the 1979 Iran hostage crisis. The CIA concocted a plot to extract the diplomats by posing as crew members for a fake sci-fi movie titled Argo. The real, 2012 Argo‘s top-notch cast includes Affleck, Bryan Cranston, John Goodman, Kyle Chandler, and Alan Arkin.

So it’s bad enough that we’ll have to wait an extra month to see Argo, one of our most highly anticipated movies of 2012, but what’s worse is that Argo is stealing Gangster Squad‘s slot. Fleischer’s picture now has no release date at all, although the studio maintains that the film will hit sometime this year. The timing could be tricky, however. Warner Bros. already has Alfonso Cuaron’s Gravity lined up for Thanksgiving weekend, and Peter Jackson’s The Hobbit and Baz Luhrmann’s The Great Gatsby are both slated for December. And that’s not even getting into the non-WB adult-oriented entertainments on the calendar for late 2012.

Like Argo, Gangster Squad is a fact-based dramatic period thriller with a buzzworthy cast. Ryan Gosling and Josh Brolin star as LAPD cops in the 1940s who are tasked with bringing down mob boss Mickey Cohen (Sean Penn). Nick Nolte, Emma Stone, Anthony Mackie, Michael Peña, Giovanni Ribisi, and Frank Grillo also star.

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