Michael Mayer’s sumptuous staging, a highlight of the 2018–19 season, returns with two casts of bright stars. Sopranos Aleksandra Kurzak and Lisette Oropesa share the role of Violetta, the opera’s tragic heroine, opposite tenors Dmytro Popov and Vittorio Grigolo as her ardent lover, Alfredo, and baritones Quinn Kelsey and Luca Salsi as Alfredo’s stern father, Germont. Karel Mark Chichon and Bertrand de Billy conduct one of opera’s greatest scores.