EXCLUSIVE: Disney has been mum about its plans for the Super Bowl, but we’ve learned that the studio has bought a 30-second ad for its George Clooney starrer Tomorrowland to air during Sunday’s game on NBC. The sci-fi pic, the latest theme-park adaptation Disney is grooming to be a blockbuster, has a May 22 release date. Disney had plenty of tentpoles from its Marvel stable it could showcase during TV’s most-watched event, with The Avengers: Age Of Ultron set for a May 1…