Marvel Studios President Kevin Feige has warned that fans haven't seen the full resolution to the Kree-Skrull War we saw in Captain Marvel, and there's a lot more story to be told on this front in future films.
In her solo outing, Brie Larson's Carol Danvers showed compassion for the Skrull refugees, which she learned from her mentor, Mar-Vell (played by Annette Bening). She turned on her bloodthirsty Kree army and at the end of the movie, Carol took Talos (Ben Mendelsohn) and the Skrulls to find a new home, realizing they needed her protection more than Earth.
When asked about this legacy of kindness and how it'll permeate in Carol's other cosmic adventures, Feige told Screen Rant, "Will we see it lived through more? Yeah. I mean, I think one of the things that's fun to us about the timeline of this film and the potential of future stories with these characters is there's a great past, not just of Mar-Vell, but of the entire Skrull/Kree conflict and also this gap of history between when Carol Danvers flew off with Talos at the end, spoiler, and when she arrives with the Avengers."
Carol did vow to finish taking down the Kree, however, sending her former leader Yon-Rogg (Jude Law) back to Hala and the Supreme Intelligence, thus setting up the potential for an extended war. Fans saw Carol arrive at Avengers HQ in the mid-credits scene, and Feige admitted there is fallout we haven't seen when it comes to these alien species and Carol's absence from Earth, which will be hinted at in Avengers: Endgame.
"We wanted to give her her own corner of the universe, her own mythology. While we're not specific about this in the movie, there's potential to understand where has she been this whole time," he added. "Why haven't we seen her yet? The answer is revealed and hinted at in this movie [Endgame] as she was dealing with a colossal, universal conflict in another section of the MCU."
Directed by Anna Boden and Ryan Fleck from a script they wrote with Liz Flahive, Carly Mensch, Meg LeFauve, Nicole Perlman and Geneva Robertson-Dworet, Captain Marvel stars Brie Larson as Carol Danvers, Samuel L. Jackson as Nick Fury, Jude Law as the commander of Starforce, Clark Gregg as Phil Coulson, Lee Pace as Ronan the Accuser, Djimon Hounsou as Korath the Pursuer, Gemma Chan as Minn-Erva, Ben Mendelsohn as Talos, Lashana Lynch as Maria Rambeau, Algenis Perez Soto as Att-Lass, McKenna Grace as a young Carol Danvers and Annette Bening as Mar-Vell/the Supreme Intelligence.