The Deutsche Oper Berlin has announced changes to its 2020-21 season. Instead of presenting Verdi’s “Nabucco” in August, the company will present a Verdi gala with Amartuvshin Enkhbat, Patrick Cook, Marko Mimica, Saioa Hernandez, and Irene Roberts. Performances are set for Sept. 12 and 13, 2020. On Sept. 19 and 20 Verdi’s “Aida” will be performed in a “Best of” Concert with {…}