A costumed fan attends Comic-Con International at San Diego Convention Center in San Diego, Calif., July 11, 2015.

A costumed fan attends Comic-Con International at San Diego Convention Center in San Diego, Calif., July 11, 2015.

Costumed fans attend Comic-Con International at San Diego Convention Center in San Diego, Calif., July 11, 2015.

Fans dressed as "Chewie's Angels" attending day 2 of Comic-Con International on July 10, 2015, in San Diego, Calif.

A costumed fan is seen during day 2 of Comic-Con International on July 10, 2015 in San Diego, California.

Costumed characters work the crowds on Fifth Avenue outside the convention center on the second day of the 2015 Comic-Con International held at the San Diego Convention Center on July 10, 2015, in San Diego.

A fan dressed as Snow White attends day 1 of Comic-Con International on July 9, 2015, in San Diego, Calif.

Fans in costume attend day 1 of Comic-Con International on July 9, 2015, in San Diego, Calif.

A costumed fan is seen at Comic-Con International on July 8, 2015 in San Diego, California.

Musashi Schroeder poses before playing Tom Clancy's Rainbow Six Siege at the Ubisoft event during Comic-Con, July 9, 2015, in San Diego, Calif.

Characters in costume greet each other on opening day of the 2015 Comic-Con International, July 9, 2015, in San Diego.

Dustin Agosta of Akron, Ohio, attends day 1 of Comic-Con International, July 9, 2015, in San Diego, Calif.

Randall Cheatwood, dressed as the character Gandalf from "The Hobbit" and "The Lord of the Rings," series, walks in front of the convention center on the first day of the 2015 Comic-Con International at the San Diego Convention Center, July 9, 2015, in San Diego.

Costumed characters pose for photographers in front of the convention center on the first day of the 2015 Comic-Con International at the San Diego Convention Center, July 9, 2015 in San Diego.

Jarina Montgomery, of San Diego, Calif., dressed as a zombie, walks outside the Convention Center on day 1 of Comic-Con International, July 9, 2015, in San Diego, Calif.

Jerk Salazar, of Monterey Calif, waits in line dressed as the Grinch on day 1 of Comic-Con International July 9, 2015, in San Diego, Calif.