Soprano Kristine Opolais, who was supposed to play the title role, has now withdrawn, a few months after star tenor Jonas Kaufmann withdrew. The show “is being closely watched in the opera world. Early in his tenure Mr. Gelb replaced an opulent, beloved old production by Franco Zeffirelli with a starker, more sexually charged one by Luc Bondy, alienating large swaths of the audience. So there is a lot riding on the new staging.”