No plot guaranteed
This movie is just an arc that will extend to beginning of Infinity War Part II.
They will eleborate some on how Captain Marvel gets her powers and that’s it. The plot will be non-existent and irrelevant as the only purpose of this movie is to establish the character.
We are also guaranteed to see unnecessary Easter Eggs to please those type of fans and some #metoo feminism bits.
Of course it will still make a billion dollars, but not because it will be a good movie.