In this Wednesday photo, Luis Ramos, left, of San Diego takes a picture of his son Alek, third from right, and daughter Anabel, second from right, and their friends Emiliano Beltran, fourth from right, and Isabel Beltran, before Preview Night at Comic-Con International at the San Diego Convention Center, in San Diego. The four-day 2019 Comic-Con kicks off Wednesday, July 17, 2019, when the showroom floor opens to thousands vying for exclusive merchandise. (Photo by Chris Pizzello/Invision/AP, File)

SAN DIEGO — Dust off your Captain Marvel cosplay, San Diego Comic-Con is here.

The four-and-a-half day convention kicks off Wednesday when the show room floor opens to thousands vying for exclusive merchandise, from art to toys. Later, Warner Bros. will get things going with a ScareDiego event promising some hair-raising new footage from “It: Chapter Two.”

“We have some exciting footage but I can’t go into details,” said “It” director Andy Muschietti. “But I think it’s going to be worth it for the fans to go and watch.”

Movie fans will also get a look at Paramount’s “Terminator: Dark Fate” at a Hall H presentation Thursday, and on Saturday be treated to a Marvel Studios presentation with its president, Kevin Feige. Details for the Marvel show are being kept under wraps, but many expect Feige and his “special guests” will outline the plans for Phase 4 of the Marvel Cinematic Universe, which could include announcements about “Black Widow,” ”Guardians of the Galaxy Vol. 3,” ”Shang-Chi” and “The Eternals.”

The movie fare is lighter than usual, however. A few of the studios have chosen to sit this year out, like Sony, which is already cleaning up at the box office with “Spider-Man: Far From Home,” and Universal Pictures, which doesn’t have any superheroes on its slate at all. Although Warner Bros. is coming with “It: Chapter Two,” it does not have a big Hall H presentation planned for any of its DC properties like “Joker” and the Harley Quinn spinoff “Birds of Prey.” And there will be no “Star Wars” news either.

“If anything, the exiting of some movie studios has made more room for TV and TV is just the best of the best right now,” said Perri Nemiroff, a senior producer for Collider.com and host of the YouTube series Movie Talk.