There’s a possibility that whoever they find to direct the film will want to rewrite portions of it.
She was also able to confirm that there is a script in existence.
This likely refers to the script that James Gunn wrote before he was fired.
The script was the subject of conversation a few months ago, as it was unknown what Gunn’s progress on it had been or how much of it Marvel would be using for Vol. 3.
…
7 Major Things The Avengers: Endgame Trailer Taught Us