WASHINGTON--(BUSINESS WIRE)--National Geographic unveiled the official trailer for LION, an emotional, real-life drama that chronicles the remarkable four-year journey of a tiny lion cub named Kio as he becomes a king. LION is executive produced by Disney Legend and “The Lion King” live-action director Jon Favreau and BBC Studios Natural History Unit’s Creative director Mike Gunton (“Planet Earth II,” “Dynasties”), with the score by legendary Academy Award®-winning composer Hans Zimmer (“Dune”