Originally Posted by Captain Marvel
Bad idea. Don't bother with Mar-Vell at all and just make Ms. Marvel. She doesn't need Mar-Vell to have a workable origin, and having her dependent on another superhero who'll die is just starting her off on the wrong foot. Set her up as the main hero of her movie series from the start, not the backup hero.
Well, you could always have Mar-Vell start off as the hero, like Steven Segal in Executive Decision. He seems to be the main hero, but dies a quarter of the way through, and the mission is left to Kurt Russell, who is playing against type as not the macho type.
It would be a surprise to people watching the movie and expecting the standard superhero film, and would make them sit up. It could be marketed as a Captain Marvel movie but actually turn out to be a Ms Marvel movie.