So THAT’s why Carol Danvers/Captain Marvel (Brie Larson) was beating up a grandma on a train in the first Captain Marvel trailer—the grey-haired lady was a Skrull in disguise (these aliens can shapeshift, remember) and Cap was only doing what any intergalactic superhero must. Such is how the second trailer for Anna Boden and Ryan Fleck‘s upcoming film begins, with a beat-down on a public train that had us all somewhat confused until now.