Captain Marvel ain't near Iron Man, Thor or Cap.
She belongs in the obscure supers like Dr. Strange, Ant-Man, Sub-Mariner.
I mean, come on... when you guys all saw Adventures In Babysitting, did you really have no clue who the little girl was pretending to be... or when they ran into Vincent Dinofrio with his golden locks and massive hammer as the Auto-Shop dude? If John Hughes was throwing an entire Thor storyline into one of his movies in the mid-80's, it wasn't obscure.
Iron Man maybe a little more, but I grew up around Ouchie and Brother Not Ouchie with comics stacked to the ceiling so maybe that's why I knew him. But even with that said, with all those comics, I never even heard of Captain Marvel. If I have no clue who she is living with those two comic geeks, there's no way most of the rest of the country does, thus... she needs an origin story.
Overall, I'd say growing up, the main main-stream supers were Bats, Supes, Spiderman, WW and Hulk (both of them probably more because of their TV shows than anything else) with the X-Men coming next (mostly Wolverine and Professor X and I think their prominence came mostly from a kick-ass saturday morning cartoon), then Thor, Cap and Iron Man trailing at the end. The rest were super obscure that only geeks like my brothers knew.
By the way... I'm calling my shot now. Rami Malek ends up playing either The Sub-Mariner or ends up being the new Wolverine once Marvel reboots that entire series.