NEW ORLEANS — NFL’s schedulers always find a way to send the Atlanta Falcons to the Superdome for landmark games. In 2006, for the first one played in New Orleans after Hurricane Katrina, the visitors were flattened by an emotional freight train. Now comes Sean Payton’s return from his bounty ban before a fan base that has eagerly awaited the chance to cheer for the club’s only championship-winning coach in a meaningful game.