Well, it seems like things are certainly changing in the MCU, especially for Brie Larson.

***THE FOLLOWING CONTAINS SPOILERS FOR GUARDIANS OF THE GALAXY VOL. 3***
Related: ‘Guardians of the Galaxy Vol. 3’ Post-Credit Scenes Explained
James Gunn’s final project in the Marvel Cinematic Universe (MCU) is Guardians of the Galaxy Vol. 3, which is set to be the last outing for the superhero team, with several of its members bidding farewell to the MCU. John Murphy scores the film, alongside the classic “Awesome Mix” now on its 3rd Volume. The Walt Disney Company’s Marvel Studios’ third act of the franchise follows the Guardians’ recent appearances in Thor: Love and Thunder (2022), and the Avengers series of films within the Infinity Saga. The movie, which is scheduled for release on May 5, 2023, follows directly from events in The Guardians of the Galaxy Holiday Special, a Marvel Studios Special Presentation on Disney+.

James Gunn bids farewell to the Marvel Cinematic Universe (MCU) with The Walt Disney Company’s Marvel Studios epic send-off, Guardians of the Galaxy Vol. 3. The movie features a familiar cast reprising their roles from the first two Guardians of the Galaxy films, including Star-Lord (Chris Pratt), Gamora (Zoe Saldaña), Nebula (Karen Gillan), Groot (Vin Diesel), Rocket Raccoon (Bradley Cooper), Drax the Destroyer (Dave Bautista), Mantis (Pom Klementieff), Kraglin Obfonteri (Sean Gunn), Stakar Ogord (Sylvester Stallone), and Cosmo the Spacedog (Maria Bakalova). They face new challenges with the arrival of Adam Warlock (Will Poulter) and Ayesha (Elizabeth Debicki), as well as the High Evolutionary (Chukwudi Iwuji) and Theel (Nico Santos). The movie also introduces new characters, including Lylla the Otter (Linda Cardellini), Teefs the Walrus (Asim Chaudhry), and Floor the Bunny (Mikaela Hoover), who are Rocket’s former cellmates and friends.
How Guardians 3 introduced the new Captain Marvel
It seems that Brie Larson’s Captain Marvel/Carol Danvers role might eventually go to this new actress.

Related: Marvel Studios Faces Huge Strike, MCU Likely Delayed For Indefinite Future
Based on the post-credit scene of Guardians of the Galaxy Vol. 3 (technically the mid-credit scene), it was revealed that a young character might be being primed to take on the mantle of Captain Marvel in the future.
The new Guardians team in this scene is made up of Rocket Raccoon, Adam Warlock, Kraglin Obfonteri, Cosmo the Dog, Blurp, and a fully grown Groot. This new group of Guardians adds a young girl rescued from the High Evolutionary’s group of science experiments, referred to as Phyla and portrayed by Kai Zen. This character is a significant reveal as she is actually Phyla-Vell from the Marvel Comics.
Who is Phyla-Vell in Marvel, and why is she important?

Phyla-Vell is a Kree superhero from the Marvel Comics universe. She is the daughter of the original Captain Marvel, Mar-Vell, and possesses superhuman abilities such as strength, agility, and the ability to fly. Phyla-Vell has taken on various superhero identities throughout her time at Marvel, including the mantle of Captain Marvel and Quasar, and has been involved in various story arcs and teams such as the Guardians of the Galaxy and the Annihilators.
How does this all play into the MCU in particular? Well, even though Phyla-Vell is currently still a child — who knows how fast she’ll age as a highly-evolved genetic experiment from the High Evolutionary’s (HE) unknown gene sources? Seeing as HE is considered a god in some areas of the galaxy according to Gamora and Nebula, and “fathered” many civilizations and societies including The Sovereign — the golden race of people whom Ayesha and Adam originate from — it probably won’t be surprising to find out he has connections to the Kree. Perhaps he’s using Kree DNA in his experiments, or perhaps he even helped develop some of those Kree technologies that brought Captain Marvel into being in the first place.
All of this is up to the big wigs over at Marvel Studios — it’s really now up to Marvel President Kevin Feige to take these gifts that his now-rival James Gunn, Head of DC Studios, has bestowed upon him in his final farewell to the Marvel Cinematic Universe, and use them well. Either way, it seems like Brie Larson has an out from the Captain Marvel role, should she want to depart the MCU like so many of her co-workers.
What do you think about this new Captain Marvel casting? Share your thoughts in the comments below!