Summer's first tentpole release will actually unspool in the final four hours of the spring boxoffice season. Paramount has scheduled Marvel-produced "Iron Man" for 2,000-plus "special advance screenings" at 8 p.m. Thursday. Pic awareness and must-see sentiment are so broad that only one studio has scheduled a rival wide release for this weekend, when Sony will hope its Patrick Dempsey starrer "Made of Honor" can attract a few women in search of something fresh besides "Iron Man."

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