(Credit: Opernhaus Zurich/ Bergen National Opera/Teatro alla Scala) This weekend is filled with unknown repertoire and some masterpieces starring exciting rising stars.  Here are the seven operas we believe you cannot miss. Čert a Káča – Anhaltisches Theater, Germany Dvořák’s rarely performed work gets a new production by Jakob Peters-Messer. The cast is led by Richard Samek and Rita Kapfhammer {…}