Test Text1 plain ? hip to be square ? You know who that is. Huey lewis. And the news. And a storm trooper. Tens of thousands, wanna-bes, Hollywood stars and reporters descending on San Diego for the... See More
Test Text1 plain ? hip to be square ? You know who that is. Huey lewis. And the news. And a storm trooper. Tens of thousands, wanna-bes, Hollywood stars and reporters descending on San Diego for the pop culture phenomenon known as comic-con. Yeah, what began as a tiny comic book convention held in a hotel basement in 1970 has become a multimillion dollar me megaevent focused on movies, videos and comic books. Reporter: It's the biggest pop culture convention of its kind where just about any character comes to life. I don't know what I have on but comic-con, all right. Welcome to the world of San Diego's comic-con. We have an outlet here where we all get together and we can meet up and we can say, hey, I like the same things here. Reporter: Roughly 130,000 die-hard fans take over downtown San Diego with the throngs of people all part of the fun. The spectacle originally comic book driven evolving over a 45-year run into the ultimate four-day celebration of all things pop. Giving fans unprecedented interactive opportunities. Like backing up jack in the "24 live another day ? drone and countless sneak peeks like unveiling Ben Affleck's cape for 2016's "Batman versus Superman," the reveal comes on the heels of the first look of him donning the suit. Even the stars like getting in on the comic-con craze. Are you going to don a mask? I've forgotten my tron hat. Reporter: What? I have the original. Reporter: How could you? Comic-con all about giving the fans a nugget of some sort. I haven't seen any of the footage. Little tip. Just a mask. Reporter: Are the fans pumped? I think the fans are really pumped. Reporter: Later today marvel entertainment takes over comic-con. Enthusiasts anticipating a presence from the stars. Sherlock's Cumberbatch -- the heart of Dr. Strange again. Dr. Strange? Oh, he's good. You're good. We would welcome you to that world. I'm just saying. For "Good morning America," Rachel smith, ABC news, San Diego. Maybe we should go next year. Yes, I want to dress up as yoda. I want to dress you both up. Oh, really. That's the deal here. That's sounded vaguely inappropriate. Uh-huh. We're a wholesome show. Even though it's in the news.
This transcript has been automatically generated and may not be 100% accurate.