This April 9, 2012 photo provided by the Metropolitan Opera shows Stephanie Blythe as Fricka and Bryn Terfel as Wotan in a scene from Wagner's, "Die Walkure," during a dress rehearsal at the ... more 

This April 9, 2012 photo provided by the Metropolitan Opera shows Stephanie Blythe as Fricka and Bryn Terfel as Wotan in a scene from Wagner's, "Die Walkure," during a dress rehearsal at the Metropolitan Opera in New York. On May 12 the Met concludes the last of three complete presentations of Robert Lepage's production of the four-opera Ring Cycle, which includes Das Rheingold; Die Walkure; Siegfried and Gotterdammerung. (AP Photo/The Metropolitan Opera, Ken Howard) less