10 Must-See Moments from Comic-Con: Hottest Trailers, Biggest Announcements & More!

With trailers dropping for films like "Wonder Woman," "Doctor Strange" and even a few TV shows like "The Flash" and "The Walking Dead," the annual convention definitely delivered the goods in 2016.

Keep reading for our picks of the Top 10 moments from this year's event!

1.) Even Celebs Got In on the Cosplay Action

Superman himself hit the convention floor in disguise this year, walking around among some of his biggest fans totally unnoticed!

Henry Cavill donned a Guy Fawkes mask to cruise the floor, taking photos with unsuspecting fans before hitting up the Warner Bros. booth during a "Suicide Squad" autograph session. After waiting in line for an autograph, he took off his mask in front of Will Smith -- who was totally caught off guard.

He documented it all in a video below:

Henry wasn't the only one who played dress up. "Arrow" star John Barrowman also wore a collection of costumes as part of his hosting gig for the con's 2016 Eisner Awards. The actor sported a Harley Quinn costume (above center), as well as ones for Squirrel Girl, Zapp Brannigan from "Futurama." He even wore a "Star Wars" dress and Kylo Ren mask at one point, just to walk around San Diego.

See all the other amazing costumes from the convention above!

2.) Warner Bros. Debuts Some Major Trailers

The entire Justice League popped up at Comic-Con to unveil the first trailer for the highly-anticipated teamup flick, which will see Batman, Superman, Wonder Woman, Cyborg, Aquaman and The Flash fight alongside each other for the first time on film.

The sneak peek offered up new shots of them all in costume, as they start to bond together against a yet-unseen common enemy. After "Batman v. Superman: Dawn of Justice" was criticized for not being funny enough, this trailer definitely brought the humor -- maybe they've learned a lesson?

That wasn't the only superhero trailer to make its debut during WB's Hall H panel though, as "Wonder Woman" threatened to steal the spotlight from her teammates.

Gal Gadot's character was certainly a standout in "Dawn of Justice" and seeing her finally get her own solo flick definitely has fans excited. Thankfully, the first trailer for her flick didn't disappoint.

After Chris Pine's character winds up on her all-lady island, she travels with him to the human world, where more threats await. We see her use her golden lasso, take out soldiers on horseback and take a stand for women everywhere. Robin Wright also gets a few standout moments in the clip, showing she's going to be completely badass wielding a bow and arrow.

WB also released a trailer for "Kong: Skull Island" -- check that out here.

3.) Marvel Delivers the Goods Too ... But Keeps Them a Secret

While Warner Bros. quickly released all of their Hall H footage online after the panel ended, Marvel went in the opposite direction, keeping it as something special for the fans who attended.

After dropping a new trailer for "Doctor Strange," the only thing they shared on YouTube, sneak peeks were shown for "Guardians of the Galaxy 2," "Thor: Ragnarok" and "Spiderman: Homecoming." All of them had deliberately '80s vibes to them.

Spidey came across like a superhero John Hughes flick, offering up the first glimpse at new villain Vulture. "Thor" gave us an idea what Hulk was up to during the events of "Civil War," while the "Guardians" footage proved that Baby Groot is not to be messed with, no matter how cute he is.

"Guardians" star Michael Rooker even popped up during the panel in his Yondu costume, equipped with a brand new Finn. The event ended with Kevin Feige finally confirming that Brie Larson will play Captain Marvel in her upcoming solo flick.

4.) Two Beloved Teen Dramas Come to an End

The final seasons of two supernatural series with huge fan followings were announced during the convention this year, as "The Vampire Diaries" and "Teen Wolf" will both be coming to an end. The latter will close with a 20-episode season, ending with its 100th episode in 2017, while "Vampire Diaries" will conclude with a 16-episode season kicking off in October.

"Teen Wolf" star Tyler Posey opened up about what to expect from the final season in an interview with toofab, as his character embraces a relationship-free existence. "I think Scott living the single life is extremely necessary. I think living the single life for anybody is necessary to figure out who you are, grow a little bit," he says. "I figured that out a couple years ago and I've grown a lot and I'm happy I took that time for myself."

He also talked about Scott's friendship with Stiles, as well as gave an update on how Dylan O'Brien is doing following his "Maze Runner" set accident. See that below -- and click here to see what costars Holland Roden, Cody Christian and Dylan Sprayberry told us about the final season.

As for "The Vampire Diaries," see what Paul Wesley and Candice King told us about a Steroline wedding above

5.) "Blair Witch" Is Back!

This is one trailer that came out of nowhere!

17 years after the release of "The Blair Witch Project," Lionsgate dropped a surprise trailer for a brand new sequel ... one that follows a group of college students searching for the trio who went missing in the first film.

"At first the group is hopeful, especially when a pair of locals offer to act as guides through the dark and winding woods, but as the endless night wears on, the group is visited by a menacing presence," a press release reveals. "Slowly, they begin to realize the legend is all too real and more sinister than they could have imagined."

The movie hits theaters September 16, 2016.

6.) "The Walking Dead" Season 7 Looks INTENSE

AMC released the first look at Season 7 of "The Walking Dead" -- which will pick up exactly where the final episode left of.

While the trailer doesn't reveal who Negan bashes to death with a bat, we do see a lot of menacing footage with him making his selection carefully. The trailer is also packed with glimpses of the Kingdom, comic book favorite Ezekiel and his much-beloved tiger, Shiva.

Yep, tigers are coming to "The Walking Dead" universe, get ready!

Season 7 debuts October 23, 2016.

7.) Ripley Reunites with Her Crew!

Sigourney Weaver and the cast of "Aliens" celebrated the film's 30th anniversary with a panel on Saturday afternoon.

Weaver was joined at the event by director James Cameron, producer Gale Anne Hurd, Bill Paxton, Lance Henricksen, Carrie Henn (Newt, all grown up!), Paul Reiser and Michael Biehn.

Not only did an audience member propose during the panel, but Sigourney talked about the much-delayed Neil Blomkamp sequel. The actress said the script "gives the fans everything they're looking for," adding, "[Neil] has work to do and I have work to do and I'm hoping when we finish those jobs we'll circle back and do it."

So, don't hold your breath!

8.) Barry Allen Screwed Up Everything

Grant Gustin's title character really messed things up in the season finale, where he was seen saving his mom from Eobard Thawne and completely changing history.

In a trailer of Season 3, the "Flashpoint" storyline from the comics comes to life ... as we get a glimpse of a world where Barry's parents are both alive, Cisco is rich and his own relationships with both Joe and Iris are nearly nonexistent.

We're told the "Flashpoint" fallout with reverberate throughout DC's television universe, with changes planned for "Arrow" as well.

Could Barry's actions be the explanation behind Wentworth Miller's Captain Cold and Katie Cassidy's Black Canary's characters coming back from the dead? Both are expected to return across the CW's superhero shows, despite being killed off on their respective series last year.

9.) The Temple Guardians Are Back!

'90s kids and their own children should be excited about this one, as Nickelodeon just revealed the first trailer for their "Legends of the Hidden Temple" movie.

According to a press release, the TV flick follows "three siblings who break away from a lackluster tour in a jungle, finding themselves immersed in a high-stakes adventure comprised of obstacles that they must complete in order to escape alive."

Talking head Olmec returns, as well as the much-feared temple guardians and that impossible-to-put-together idol.

The film will debut in fall 2016.

10.) Cara Delevingne Gets a Haircut

And last, but not least, Cara Delevingne stopped by the convention to promote two projects, "Valerian" and "Suicide Squad," showing off a new 'do and tattoo while doing it!

The model looked gorgeous on the press line alongside Dane DeHaan for their upcoming sci-fi flick with director Luc Besson, debuting her much shorter tresses after seemingly chopping them off in her hotel room earlier that day.

She also took to Instagram to put a new elephant tattoo on display too.