Do not go into this movie expecting a strictly serious biography of Christopher Columbus. This is an adventure movie by the same producers of The Three Musketeers, The Four Musketeers, Superman: The Movie, Superman II, Superman III, Supergirl, and Santa Claus: The Movie. It was directed by the same director of Iron Eagle III, License To Kill, Living Daylights, View To A Kill, and Octopussy. All of that means this isn't a serious historical biography and was never intended to be. It's a swashbuckling version of the legend of Columbus that's also cautionary tale about the destructive power of greed. It's also family entertainment so don't expect it to be too dull or deep. I look forward to the day when this movie is available on DVD.
