Rolando Villazon Triumphantly Returns To The Stage As Don Carlo In The 2007/2008 Royal Opera House'S Producton Of Verdi's Grandest Opera, Don Carlo National Theatre director Nicholas Hytner's new staging of Verdi's grandest-- and arguably greatest -- opera, Don Carlo, was the highlight of the 2007/2008 Royal Opera House season. This new production marked Rolando Villaz