That likely predated Mar-Vell and Goose’s arrival on Earth. It’s a nice theory, but I think it conflicts with the Goose the Cat Bring me Thanos shirt. But, could Goose could cough up some magical resurrection stone in the first episode of the upcoming S6? That would be most convenient for our death-prone Agent. It’s plausible this happened, but as we saw later on the seasons, trees typically visited our planet. It could’ve been a Kree from a different time point.
Goose the Cat Bring me Thanos shirt, hoodie, tank top and sweater
I seriously doubt the writers of captain marvel was thinking of agents of the shield as a tie in considering that the show rarely interacts with the films. I thought the fact that Carol had blue blood was another clue- a Goose the Cat Bring me Thanos shirt had been transfused with Kree blood and it had restorative powers. Or all of Agent Coulson that died was actually Life Model Decoys. I’m surprised they have never brought them up in the movies.