A Joker impersonator during opening day of the annual Comic-Con International in San Diego, California, United States July 21, 2016. (Photo by Rex Features/Shutterstock)





Martha Guzman screams as she tries to pose for a photo with zombies at "The Walking Dead" booth during Preview Night at Comic-Con International held at the San Diego Convention Center, Wednesday, July 20, 2016, in San Diego. (Photo by [Denis Poroy/Invision/AP)





Members of the League of Hatters walk in front of the convention center on day one of Comic-Con International held at the San Diego Convention Center Thursday, July 21, 2016, in San Diego. (Photo by Denis Poroy/Invision/AP)





epaselect epa05435772 Andy Holt, who is dressed as the comic book super hero, Hawkman, mingles outside the San Diego Convention Center on the first day of Comic Con 2016 in San Diego, California, USA, on 21 July 2016. Comic Con runs from 21 until 24 July. EPA/David Maung DOM02 (David Maung / EPA)





Dawn Richardson grabs a Starbucks drink in the costume of the Winter Soldier at the pop culture event Comic-Con International in San Diego, California, United States July 22, 2016. (Photo by Mike Blake/Reuters)





Gina Gianni of Chicago comes dressed as an animated Batgirl as she waits in a crowd to cross the street to attend the pop culture event Comic-Con International in San Diego, California, United States July 22, 2016. (Photo by Mike Blake/Reuters)





An attendee dressed as the Scarecrow from Batman poses for a picture at the pop culture event Comic-Con International in San Diego, California, United States July 22, 2016. (Photo by Mike Blake/Reuters)





Comic-Con fans dressed as characters from the Austin Power's movies pose for a photo on day two of Comic-Con International held at the San Diego Convention Center Friday, July 22, 2016, in San Diego. (Photo by Denis Poroy/Invision/AP Photo)





Linda Nguyen comes dressed as the Disney character Maleficent poses as she attends the pop culture event Comic-Con International in San Diego, California, United States July 22, 2016. (Photo by Mike Blake/Reuters)





A fan reaches out to touch the finger of a giant "World of Warcraft" Orgrim statue in the exhibit hall on day two of Comic-Con International held at the San Diego Convention Center Friday, July 22, 2016, in San Diego. (Photo by Denis Poroy/Invision/AP)





An attendee dressed as Boba Fett from Star Wars rushes his way at the pop culture event Comic-Con International in San Diego, California, United States July 22, 2016. (Photo by Mike Blake/Reuters)





An attendee keeps tabs on her cell phone as she walks the convention floor at the pop culture event Comic-Con International in San Diego, California, United States July 22, 2016. (Photo by Mike Blake/Reuters)





Attendees dressed as Harley Quinn (L) and Sailor Moon pose for a picture at the pop culture event Comic-Con International in San Diego, California, United States July 22, 2016. (Photo by Mike Blake/Reuters)





An attendee dressed as the Flash walks the convention floor at the pop culture event Comic-Con International in San Diego, California, United States July 22, 2016. (Photo by Mike Blake/Reuters)





Leah Thomas, of San Diego, dressed as Diva Plavalaguna from “The Fifth Element”, attends day 1 of Comic-Con International on Thursday, July 21, 2016, in San Diego. (Photo by Chris Pizzello/Invision/AP Photo)





Lauren Lim chats with her friend as she attends the pop culture event Comic-Con International in San Diego, California, United States July 22, 2016. (Photo by Mike Blake/Reuters)





Wonder Woman gathers her hula hoops during opening day of the annual Comic-Con International in San Diego, California, United States July 21, 2016. (Photo by Rex Features/Shutterstock)





Patricia Osmond of El Paso dressed in steampunk during opening day of the annual Comic-Con International in San Diego, California, United States July 21, 2016. (Photo by Rex Features/Shutterstock)





Friends outside the convention center during opening day of the annual Comic-Con International in San Diego, California, United States July 21, 2016. (Photo by Rex Features/Shutterstock)





Todd Schimt, dressed as the Silver Surfer, carries his surfboard into the convention center on day one of Comic-Con International held at the San Diego Convention Center Thursday July 21, 2016, in San Diego. (Photo by Denis Poroy/Invision/AP Photo)





Lorraine Ouellette, a member of the League of Hatters, poses for a photo in between two Mad Hatters on day one of Comic-Con International held at the San Diego Convention Center Thursday, July 21, 2016, in San Diego. (Photo by Denis Poroy/Invision/AP Photo)





A mother and her six-year-old daughter as matching Ms Marvels during opening day of the annual Comic-Con International in San Diego, California, United States July 21, 2016. (Photo by San Diego Union/Rex Features/Shutterstock)





A husband and wife dressed as life-size Lego versions of agents Mulder and Scully from the X-Files during opening day of the annual Comic-Con International in San Diego, California, United States July 21, 2016. (Photo by San Diego Union/Rex Features/Shutterstock)





Sergio Valente, dressed as Superman, lifts Jessica Randall, dressed as Vixen, as she gives him a kiss outside of the convention center on day one of Comic-Con International held at the San Diego Convention Center Thursday, July 21, 2016 in San Diego. (Photo by Denis Poroy/Invision/AP Photo)





Fans dressed as “Chewie's Angels” pose for a photo on day two of Comic-Con International held at the San Diego Convention Center Friday, July 22, 2016, in San Diego. (Photo by Denis Poroy/Invision/AP Photo)





A fan dressed as Super Shredder checks his Instagram on day 2 of Comic-Con International on Friday, July 22, 2016, in San Diego. (Photo by Al Powers/Invision/AP Photo)





Friends outside the convention center during opening day of the annual Comic-Con International in San Diego, California, United States July 21, 2016. (Photo by WENN/SIPA Press)





Isis Cress, dressed as the goddess Isis, poses for photographers outside of the convention center on day one of Comic-Con International held at the San Diego Convention Center Thursday July 21, 2016 in San Diego. (Photo by Denis Poroy/Invision/AP Photo)





Max Sovers, 6, plays the part of Anger from the movie Inside Out during Comic-Con International 2016 in San Diego, California on July 21, 2016. (Photo by Bill Wechter/AFP Photo)