Captain Marvel will tell an origin story in the upcoming 2019 film as confirmed by Marvel President Kevin Feige. While speaking to Cinema Blend, Feige confirmed that while Phase 3 films do focus on sequels and team-ups, there will be instances of origin stories popping up, such as in Captain Marvel and Black Panther, despite the character’s previous introduction in Civil War.
“[Black] Panther is not really an origin story, since we saw him already in Civil War. But his standalone certainly introduces you to 99% of his world that you never saw. And Captain Marvel is certainly an origin. It’s an origin story from the start.”
Feige did not confirm whether Captain Marvel would show up in Avengers: Infinity War. Captain Marvel is set to debut March 8, 2019.