Verdi’s IL TROVATORE again storms the Met stage in a star-studded, anvil-wielding cast , including Sondra Radvanovsky, Dolora Zajick and Dmitri Hvorostovsky. Marcelo Álvarez sings Manrico, the troubadour of the title. The story is well-known already: The gypsy Azucena has harbored a grudge for thir...