I found the movie disappointing. There was no reason to keep this character a secret. I can see where she will be helpful in Endgame, but this movie did not leave me especially rooting for more Captain Marvel. It was entertaining, there were some funny lines, but it felt forced to make her a full length feature film character. For them to have kept her a secret, and bring her in at the end like this, I honestly was expecting to be wowed by the character.