Rumor has it that Marvel is eyeing Rebecca Ferguson for the role.
Word is she might already be in talks with the studio. We've been speculating for a while about who will be playing Captain Marvel (@DanRodriguez mentioned Bridget Fonda @MyNoahIsName picked Kate Mara and @ssantiago0911 @VinMcCarthy are on #teamRousey ). The film isn't due to be released for a few years (November 2018), but that doesn't mean fans aren't already excited!
You might recognize Ferguson from the most recent Mission Impossible movie, but aside from that the Swedish actress hasn't been in much. Which is Marvel's M.O. They pick up actors that have a few impressive credentials but no major roles to their name. This is partially because they don't want the preconceptions of the audience to alter the way they view the film.