An attendee in costume at Comic-Con International in San Diego, California, on Friday, July 19, 2019. Starting in 1970, the convention is one of the world's major comic festivals and attracts around 130,000 registered visitors every year. [Photo: VCG/Reuters/Mike Blake]"

A man in costume poses for a photo at Comic-Con International in San Diego, California, on Friday, July 19, 2019. This year's Comic-Con kicked off on Thursday and will run until Sunday at the San Diego Convention Center. [Photo: VCG/AFP/Chris Delmas]"

Participants in cartoon character headgear at Comic-Con International in San Diego, California, on Friday, July 19, 2019. A massive program is planned for the four-day event, including hands-on workshops, the Comic Art Conference, anime and film screenings, and the Will Eisner Comic Industry Awards, which are the Oscars of the comics industry. [Photo: VCG/Reuters/Mike Blake]"

Attendees dressed as comic characters at Comic-Con International in San Diego, California, on Friday, July 19, 2019. The convention was organized by a California-based nonprofit public benefit corporation that aims to promote comic culture to the public and to celebrate the contribution of comics to art and culture. [Photo: VCG/Reuters/Mike Blake]"

An attendee in cosplay poses for a photo at Comic-Con International in San Diego, California, on Friday, July 19, 2019. [Photo: VCG/Reuters/Mike Blake]"