Avengers: Endgame - 33 Easter Eggs & References Explained

21. Budapest

When Hawkeye and Black Widow depart on their mission to Vormir to retrieve the Soul Stone, Hawkeye quips that they're "a long way from Budapest."

This is a reference to a memorable gag in The Avengers, where Natasha remarks that the Battle of New York reminds her of a mission they undertook in Budapest, while Clint retorts, "You and I remember Budapest very differently."

We still have no idea exactly what happened in Budapest, and given that Black Widow doesn't make it out of Endgame alive, we probably never will (short of a surprise appearance by a younger Hawkeye in her upcoming solo prequel).