The new trailer for Captain Marvel hides an Easter egg that may spoil at least one connection to 2012's Avengers, and tie Carol Danvers to Marvel Cinematic Universe continuity.
As Screen Rant notes, S.H.I.E.L.D.'s Project P.E.G.A.S.U.S., which was first mentioned in Iron Man 2 and then fully revealed in The Avengers, will have a role to play in the 1990s-set film.
The trailer depicts Nick Fury and Carol Danvers stealing a Quinjet emblazoned with the P.E.G.A.S.U.S. logo. In all likelihood, Fury takes Carol to the same P.E.G.A.S.U.S. facility in the Mojave Desert that was destroyed in The Avengers after Loki invaded to steal the Tesseract.
The Tesseract was housed and studied at that facility, perhaps even by Howard Stark himself at one point. It's possible that the infiltration by Skrulls, led by Talos (Ben Mendelsohn), is part of a grand scheme to obtain the Tesseract and harness its power.
What all of that indicates is Captain Marvel, as a prequel, will not only fit into the MCU timeline, but retroactively set the stage for key events that follow.
Directed by Anna Boden and Ryan Fleck from a script they wrote with Liz Flahive, Carly Mensch, Meg LeFauve, Nicole Perlman, and Geneva Robertson-Dworet, Captain Marvel stars Brie Larson as Carol Danvers, Samuel L. Jackson as Nick Fury, Jude Law as Mar-Vell, Clark Gregg as Phil Coulson, Lee Pace as Ronan the Accuser, Djimon Hounsou as Korath the Pursuer, Gemma Chan as Minn-Erva, Ben Mendelsohn as Talos, and Lashana Lynch as Maria Rambeau. The film arrives on March 8, 2019.