For the first time in decades, both the Writers Guild of America and the Screen Actors Guild-American Federation of Television and Radio Artists unions are both on strike. The SAG-AFTRA strike comes at a terrible time for San Diego Comic-Con and other fan conventions. Since marketing and promotion are part of an actor's job, this means they can't attend most convention appearances.
Source：https://www.cbr.com/sag-aftra-strike-convention-appearances-explained/
