We know that Marvel Cinematic universe will systematically expand to include 68 characters who will appear in the last two Marvel Phase 3 movies, the consistent trend with Marvel movies is first the solo movie launches the character, and then it is brought into the ensemble superhero movie, for instance, Ant-Man, Thor, Iron-man, Hulk, Captain America etc. Black Panther, Spiderman and now Captain Marvel are good examples of a reverse trend. The Russo brothers during the conversation at Smithsonian Institute made it clear that Captain Marvel/Carol Danvers will be in Infinity war movies to be released in May 2018 & May 2019. There is also a speculation that one of the superhero characters in Marvel cinematic universe could be a lesbian or transgender.
Carol Danvers is an airforce pilot who met with a major accident that led to her DNA getting mixed with an alien which gave her super-strength. She is also famous for being a female superhero who aggressively fight for equal pay for women. The Oscar-winning actress Brie Larson (Room, 21 Jump Street, Rachel in Community TV series) is confirmed to play the iconic female superhero Captain Marvel as part of Phase 3 of Marvel cinematic universe.
She will make her debut in Avengers Infinity War much like Tom Holland’s Spiderman. She may gain her powers soon unlike him who is not fully aware of his abilities. On a power level, she is equivalent to Vision or Scarlett Witch, popularly known as Wonder woman of Marvel universe. It is possible that we may see an Infinity gem that will mark her transition from an airforce pilot to a superhero. She is an Avenger living in space. There is a strong possibility that she may assume a leadership position within the ranks of S.H.I.E.L.D and Team Avengers who is charged with defending the world from extraterrestrial forces.