Amidst high expectations for "Batman v. Superman: Dawn of Justice" footage and cast appearances, the Warner Bros. panel Saturday morning should be one of the week's major events at Comic-Con International in San Diego. With the cast of both "Suicide Squad" and "Batman v. Superman" on hand, WB showed new footage and announced "Green Lantern Corps."

Moderator Aisha Tyler took the stage to introduce the first video.

The first trailer was a highly stylized preview of Guy Richie's "The Man from U.N.C.L.E." starring Henry Cavill, Armie Hammer, Alicia Vikander, and Elizabeth Debicki. A nice car chase begins with Cavill's character instructing, "When you hear something that sounds like a gunshot, drive!" The Cold War action flick looks to have a lot of the style of "Snatch," another of Richie's films.

After the trailer, Henry Cavill, Armie Hammer, Alicia Vikander, and Elizabeth Debicki take the stage.

"Guy Richie really knows how to draw that line between being at loggerheads and making it funny," Cavill said of the director. He also said this was largely his first experience with comedy but "Guy makes it easy."

Vikander said "my parents were young in the '60s," and she had always wanted the chance to dress in the style. Debicki added, "the Sixties and Seventies were a golden age for villains, and to play a villain in the sixties was great."

Hammer said using a Russian accent "made everything sound more bad ass." Dialogue coach Andrew Jack put the actors through their paces.

Cavill said that, coordinating the bathroom fight scene shown in the trailer, "the first take, everything went wrong, none of the walls broke." But the comedy of that helped inform their performance.

Asked about finding connection to their characters, Debicki said, "Well, I'm evil at heart, so it was very easy."

"Napolean was a mischievous rogue," Cavill said of his character, and the guiding principle was "have fun."

After "U.N.C.L.E.," a "Pan" preview led into the next discussion. Director Joe Wright, Levi Miller, Garrett Hedlund, and Hugh Jackman took the stage.

"It's really Peter Pan for 2015, and a complete reframing of the story as we know and love it," Wright said. "It's an origin story of how Peter became Pan."

Hedlund said that Wright presented the film to him as "the darkest take imaginable" to show kids that anything can be overcome.

Jackman said that "Neverland is a set," not green screen. He said it once took him and an assistant director 15 minutes to find Wright on the set. "He was lost under a mushroom."

"I felt it would give us more of an immersive experience," Wright said, adding that it would also help Miller navigate his first film role.

"This is one of the most fun movies I've ever made," Jackman said. "Joe set the mood, there was music playing all the time. ... And the pirate ships are to scale!" The pirates also got to improv costumes, Jackman said.

Another clip showed Blackbeard's initial speech to the children, reading off the rewards for hard work and the punishment for failure.

"If you assume that Neverland is a child's imagination, all adults should be frightening and ridiculous," Jackman said of Wright's vision for the movie.

"For me, the main inspiration from Barrie's book is that it's a very strange book," Wright said. "There are no real goodies or baddies; even Peter is quite flawed. ... In the end, he stabs Hook in the back, in a very duplicitous way."

And now the main event! Comic clips play on the screens before transitioning to the DC Entertainment logo and a review of DC's history on TV and screen, narrated by "Batman v. Superman" stars Cavill and Affleck and director Zack Snyder. A flash of a "Green Lantern Corps" logo announces the film for 2020.

"Suicide Squad" clip plays first, then director David Ayer took the stage.

"It's all about canon, it's all about the source material ... you guys know what you want, and we've got it!" Ayer said. "This good vs. evil shit is played out, get ready for bad vs. evil!"

"This is a little something I found on the internet I want to show you," Ayer said, introducing a clip by referring to early leaks.

Waller introduces the idea of the Squad. "I put 'em in a hole and threw away the hole," but she sees an opportunity to have them do some good." Harley is shown doing acrobatics in a cagelike prison. And then the rest of the Squad assemble. A character in a very fake Batman suit is shown shooting up a building; "Oh, I'm not gonna kill ya," Leto's Joker says, "I'm just gonna hurt ya. Really, really bad."

Margot Robbie, Tom Hardy,Jai Courtney, Joel Kinneman, Viola Davis, and Will Smith took the stage briefly to greet fans, but there was no time for Q&A.

"We are banging out something that is absolutely fantastic," Will Smith said.

Now, "Batman vs. Superman." Zack Snyder took the stage first.

"I've always been into the big icon superheroes," Snyder said. "Getting the chance to make this particular movie with this particular cast, I don't know how it gets any better."

Then Holly Hunter, Jesse Eisenberg, Amy Adams, Henry Cavill, Ben Affleck, and Jeremy Irons took the stage.

WATCH: New "Batman v. Superman" Trailer Dawns on Comic-Con

New footage came next. Buildings fall, Bruce Wayne rushes into action. There is a feud between Bruce Wayne and Clark Kent, and Martha Kent tells her son to either "be the hero" ... or don't.

"If you want to talk about the story itself, or the particuloars of this movie, it's based on ideas we had in a room," Snyder said, but Batman fighting Superman is not new. "I homage a lot to Frank Miller in the movie," but this is not "Dark Knight Returns."

The big change, Snyder said, is "we put Metropolis and Gotham next to each other."

"There's always kind of a campy element" to Lex Luthor, Eisenberg said, but the he has a "real emotional core" in the new movie.

"I've wanted to be Lois Lane since I was five years old," Adams said.

Affleck said Snyder approached him a Batman he thought was "perfect for the actor. "Well, what do you mean? 'Well, he's older, he's at the end of his rope...'" he said to laughter. He also said he ran into previous Batman Christian Bale at a Halloween costume shop in the Batman section, who advised him, "make sure you can piss in that suit." Later, he added, "Christian Bale was also buying a suit for his son, he wasn't just there."

Snyder said Holly Hunter plays an original, "super important part" that was written just for her.

Tyler asked Snyder about "mecha Batman." "It's a self-preservation concept," Snyder said. "It's not giving him extra strength, but it's buying him time."

The panel concluded with a repeat of the new trailer.