Avengers Endgame’s global box office has passed the non-adjusted box office of Titanic. Avengers Endgame only trails Avatar at about $2.8 billion. Avenger Endgame should easily get another $300 million in the USA alone and another $700 million overseas. It will thus pass $3 billion and could reach the inflation-adjusted total for Avatar.
If there is exceptionally strong repeat viewing then Avenger could top $1 billion in the USA and $1 billion in China.