In the climatic battle between Thanos and the Avengers, they are all pinned down as Thanos’ ships rain fire upon the field. Suddenly, their guns aim upward toward something entering the upper atmosphere. It is the arrival of Captain Marvel. She takes down Thanos’ ships, gets the gauntlet from Spider-Man and flies toward Thanos. They fight.
In the fight between Thanos and Captain Marvel, he headbutts her. Carol Danvers is barely phased during the encounter and she seems to be gaining energy, why? Thanos was taken on Captain America, Thor, and Iron Man, barely receiving a scratch. How is Captain Marvel able to take the headbutt from Thanos and still live? How is Carol Danvers so powerful?
Could it be the Infinity Stones? Her power comes from them, are they charging her up?
Channel Dad Bryon Lape reads an article by Brandon Zachary on CBR.com discussing how and why Captain Marvel is so powerful against Thanos. He is not able to defeat her and has to use one of the Power Stones in order to punch her out of the movie.
Brie Larson entered the MCU as Captain Marvel in her own movie, but Infinity War and Endgame were created before the Captain Marvel movie. As MCU Phase 5 comes to life, it is most likely that Carol Danvers will be the single leader of the Avengers.