The only reason why man of steel did so well at the box office is because the film has the Nolan name stamped on it
Superman while been familiar has never been a huge box office draw. WB did good for themselves when they decided to market the film as a Nolan film.
Chris Nolan has one of the biggest fan base in film history. Believe me,
if Nolan's name was not on Man of Steel , the film would have struggled at the box office.