10(Don't Want) A Catch-Up/Filler Story
Many MCU films, especially in Phase 1 and 2, spend too much time just trying to either show us what a character was up to in the intervening period of time. When time skips are incorporated, this becomes even more the case.
Carol Danvers spent over twenty years flying around space. Her movie shouldn't just be "Oh, and here is what she was up to during that time." The story should meaningfully advance Carol's arc and the arc of the MCU in some way that feels meaningful. A superficial Captain Marvel film that adds little to the expanded universe would be a waste of Carol's potential.