Where Are All the Avengers Before Endgame?
Before We Get Caught Up in Endgame Mania, Let's Remember Where We Last Saw the Avengers
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Though she's not visually seen anytime before Infinity War, Fury does call Captain Marvel in the postcredits scene. So her insignia is seen! We have no idea where she is before that, but based on how Captain Marvel ends, we'll say space!