One thing about Marvel Studios is that they believe in their characters and never really stop working on them. There was a time when people thought that the MCU really couldn't do anything special without RDJ as Iron Man. But now he's one beloved character among many, because the studio built up so many other characters, including Cap and Thor, to the point that they are also audience favorites.
Even a character like Hawkeye, who never really made much of an impression, is coming back and getting a revamp. Did they need to do that? No, they could have probably dropped him entirely, but that's just not how they approach the characters.
So they will keep working on Carol Danvers as well. I personally liked the movie a lot, even more the second time I saw it. But it's just the beginning.
Even a character like Hawkeye, who never really made much of an impression, is coming back and getting a revamp. Did they need to do that? No, they could have probably dropped him entirely, but that's just not how they approach the characters.
So they will keep working on Carol Danvers as well. I personally liked the movie a lot, even more the second time I saw it. But it's just the beginning.