If I had a choice on how Mar-Vell was to be played, I'd look to Samurai Champloo's Jin, a stoic ronin who absolutely lethal.
However it's likely that the movie will do its own thing - the script might well call for Mar-Vell to have become a pacifist, for example. They might even have him in Carol's head the way he was in Rick Jones'. They often make pretty radical changes to characters for inclusion in the movie-verse.