Once and Future King is a Power Metal Metal Opera written by Gary Hughes in 2002, it consists of two albums and tells the story of King Arthur. It features the vocals of Gary Hughes, Damian Wilson(Threshold), Bob Catley(Magnum), Dougie White(Cornerstone), Sean Harris, Danny Vaughn, Lana Lane, Irene Jansen(Ex-Karma, Ayreon), DC Cooper(Ex-Royal Hunt, Silent Force), Sabine Edelbacher(Edenbridge) & Harry Hess.