>>100182271I've been reading comics since I was a kid, I knew who Iron Man before the movies but had never read a comic he was in but I had no problem following a comic centered series like Earth's Mightiest Heroes. Hulk I knew from the TV show, Spider-Man from even before the Raimi movies, etc. etc. And I'll admit I didn't read Marvel comics as a kid, but I knew who Billy and Captain Marvel were, and even the Shazam thing, even just from having parents of my best friend be big Elvis fans and having the Freddy/Captain Marvel Jr. archive (which I thought, save for the art, was dull crap).
People are going to know Billy and Shazam, especially compared to Carol who is essentially Star Lord tier; if she's lucky and the movie has a good soundtrack, who knows. But it won't be advance knowledge.