The Kree-Skrull War was originally published from 1971 to 1972 across Avengers #89-97, and it saw Earth's Mightiest Heroes becoming embroiled in the conflict between the two species when it came to Earth. The Kree have already been seen in Guardians of the Galaxy and several Agents of S.H.I.E.L.D. episodes, so with Captain Marvel being the penultimate movie of the MCU's Phase Three, it's about time that the Skrulls get their cinematic due following years of appearances in animated TV shows and video games. But on top of that, Kevin Feige laid out to IGN that Captain Marvel will include the mythology of the Kree-Skrull War, though Carol will primarily be clashing with the Skrulls in her solo movie.