At first, no. However, any Captain Marvel (DC) SERIES was TITLED “Shazam” because Marvel got and kept the Captain Marvel trademark. (Shazam is the name of the wizard who gave Captain Marvel his powers, but was never the main hero of the book.) But this confused people into calling the character himself Shazam, sort of the way the monster made of corpses is called Frankenstein by most people even though that’s actually the name of the scientist who created him.
Only since the character’s re-introduction in the “New 52” has the main heroic CHARACTER of that appearance been genuinely called Shazam.
The Shazam Capt. Marvel is the older character, having been published by Fawcett Comics since the 30s or 40s, IIRC, then bought by DC. The Marvel Comics Captain Marvel started out in the 60s as Mar-Vell, a Kree warrior engineered by the Kree Overmind(?) to be super-powerful but who rebelled and became a superhero on Earth (which he had been sent to to destroy?). Carol Danvers (our MCU Capt. Marvel) somehow inherited those powers (the particulars aren’t clear to me now). Then lost them to Rogue’s absorptive powers (along with her memories). There have been several more Capt. Marvels and Ms. Marvels in the comics universe (including the current Ms. Marvel, who is a hijab-wearing Muslim teenager/young woman).
The original Captain Marvel was one of the most popular comic books in history, rivaling and sometimes outselling the Golden Age Superman comics. DC didn’t care for that, and sued, arguing that Fawcett’s hero was a rip-off of Superman. They won, and Fawcett was forced to stop publishing the character. Eventually the entire Fawcett catalog was acquired by DC. While DC owned the copyright to Captain Marvel, they neglected to maintain the trademark. When Timely comics rebranded as Marvel, they saw an opportunity, created Mar-Vell, and secured the Captain Marvel trademark.
Finally saw it. It was very well made, and ultimately quite boring. Lots of fighting, which all looks the same. There’s the people throwing energy, people punching faces, and the occasional big rock tossed around. Then the winner is decided by plot anyway. They had to turn Nat into a fighter, otherwise there was nothing for her to do.
I’m pretty miffed that I sat through the whole 2 1/2 hours of that, and will have to sit through another 2-3 hrs just to watch them undo it all if I care about the characters/story/closure. That movie was such a waste of time, there better be some pretty big payoff in the next one. But will there be? I dunno.
Wasn’t she undercover at Stark Industries in the first film? And in the second one, the reason she was tied up in that chair was because she was working undercover to find something out and was using mind games to manipulate the people who thought they were interrogating her into giving her information she wanted. And she did the same sort of thing to Loki, making him think he was beating her down emotionally and getting that Banner was the target out of him?