Jason Garcia poses as The Joker from Batman at the 2015 Comic-Con International in San Diego, California, July 9, 2015. (Photo by Sandy Huffaker/Reuters)

Attendees arrive dressed as their favourite comic characters for the MCM London Comic Con, a convention to celebrate the culture of comic books and related art forms, in London, Britain, May 25, 2018. (Photo by Toby Melville/Reuters)

A runner tries to get the attention of a bull, named Santon, during the “Toro de Cuerda” (Bull on Rope) festival at Plaza de Espana square in Grazalema, southern Spain, July 18, 2016. Three bulls restrained by a rope are allowed to run through the streets of the village during the annual festival. (Photo by Jon Nazca/Reuters)

Cycling jerseys, part of a collection belonging to French cycling fan Gerald, hang from a line during the 4th stage of the Tour de France cycling race from Seraing in Belgium to Cambrai in France, July 7, 2015. Photographing the Tour de France cycling race comes with highs and lows: the buzz from capturing just the right image, the tedium of long journeys, the painstaking set-up of equipment, the breath-taking scenery. Reuters photographers have worked not only to capture the thrills and spills on the roads and mountain passes. They have also shot a set of pictures showing their own quirky view from behind the scenes as they travelled through the Netherlands, Belgium and France. (Photo by Eric Gaillard/Reuters)

View of Evolutions installation by artist Yann Nguema at the Saint-Jean Cathedral during the rehearsal for the Festival of Lights (Fetes des Lumieres) in Central Lyon, France, late December 7, 2016. (Photo by Emmanuel Foudrot/Reuters)

Summer Zhai and Vicky He, dressed as characters from the anime "Love Live!", rest on stairs during day two of New York Comic Con in Manhattan, New York, October 9, 2015. The event draws thousands of costumed fans, panels of pop culture luminaries and features a sprawling floor of vendors in a space equivalent to more than three football fields at the Jacob Javitz Convention Center on Manhattan's West side. (Photo by Andrew Kelly/Reuters)

Liz Katz attends Day 1 of WonderCon held at Anaheim Convention Center on March 23, 2018 in Anaheim, California. (Photo by Albert L. Ortega/Getty Images)

A woman with a Hello Kitty tattoo waits in line to attend the Hello Kitty Con, the first-ever Hello Kitty fan convention, held at the Geffen Contemporary at MOCA Thursday, October 30, 2014, in Los Angeles. The convention was held to honor the character's 40th birthday. (Photo by Jae C. Hong/AP Photo)