The second trailer for Captain Marvel was released last week and gave fans an even more in-depth look at what to expect from the Brie Larson-starring film when it arrives in theaters on March 8, 2019. If you were focused on Carol Danvers's intense/hilarious dialogue with Nick Fury, you might have missed an important Easter Egg that could link the film to 2012's The Avengers.
In the new trailer, Danvers and Fury are seen stealing a Quinjet that features the P.E.G.A.S.U.S. logo. Fans of the Marvel Cinematic Universe probably remember that Project P.E.G.A.S.U.S. is the name of S.H.I.E.L.D.'s secret operation that studies the Tesseract, and is based in a subterranean facility in the Mojave Desert.
The Tesseract was housed in the facility before Loki destroyed it in the original The Avengers. It's entirely possible that the infiltration by the Skrulls, led by Talos, is part of a scheme to retrieve the Tesseract and harness its powers.
It's only a theory at this point, but if it turns out to be true, it would place Captain Marvel into a spot in the timeline that could link it—and Carol Danvers—to other key events that have occurred in the Marvel Cinematic Universe. And it could add further credence to another fan theory that suggests Captain Marvel might be the key to defeating Thanos in Avengers: Endgame.