Marvel does official comic preludes for all of the MCU movies to fill in the gaps between them with official canon explanations of what the characters were doing prior to the movie, and Captain Marvel will get one this November prior to her MCU introduction in March 2019.
Newsarama just posted Marvel’s November 2018 solicitations, and this is the official Marvel description for the Captain Marvel comic prelude:
“Before CAROL DANVERS takes flight in 2019’s first Marvel Studios film, immerse yourself in this all-new adventure! Spinning out of the mysterious events of Avengers: Infinity War, NICK FURY and MARIA HILL set off on life-or-death missions that lead directly to the appearance of CAPTAIN MARVEL!”
Since Nick Fury and Maria Hill were dusted in Infinity War, could this be set in the 90s? But wouldn’t Maria Hill be a little young then? The description doesn’t make too much sense, but we’ll just have to wait for the comic to see what it all means.
Here’s the full cover: