The Deutsche Oper am Rhein in Dusseldorf has announced the first three months of its 2020-21 season featuring chamber operas, among other works. Here is a look at the schedule. The season opens with Comedian Harmonists in concert with Cornel Frey, Jussi Myllys, Luis Fernando Piedra, David Fischer, Florian Simson,  Sander De Jong, Dmitri Vargin, Jake Muffett, Günes Gürle, Sami {…}