The Metropolitan Opera has announced its 2018-19 season. Here is a rundown. New Productions  The Metropolitan Opera opens with Saint-Saëns’ “Samson et Dalila” in a new production by Darko Tresnjak. Roberto Alagna and Elina Garanca reunite for the production which is also set to star Laurent Naouri, Elchin Azizov, and Dmitry Belosselskiy. Anita Rachevlishvili and Aleksandrs Antonenko will sing a {…}