To fête its centennial, the San Francisco Opera has assembled a knockout roster of 15 international stars, including Karita Mattila, Nina Stemme, Susan Graham, Daniela Mack, Lawrence Brownlee, Michael Fabiano, Russell Thomas, and Brandon Jovanovich. The current music director Eun Sun Kim shares conducting honors with her predecessor Donald Runnicles and the former principal guest conductor Patrick Summers? There’s a dinner, too. Whose table are you at? —Matthew Gurewitsch