I read somewhere sometime ago, that soprano Mariella Devia didn't have plans to sing the role of Elisabetta in Donizetti's opera Roberto Devereux.
When the soprano Beverly Sills sung the three Tudor Queens operas (Anna Bolena, Maria Stuarda and Roberto Devereux) she said that Roberto Devereux took 10 years off her carrer because the role of Elisabetta is so demanding for the voice.
Gruberova is today a reference in this role, and I had the pleasure to saw her in one performance in Munich.
Recently, thanks to my friend Adélia, I found out that Devia will sing the role for the first time in Marseille's opera in November (concert version). This are very good news for those who appreciate bel canto in the most beautiful and pure form.
More information here.