Stephen McFeely admits that the original plan for Avengers: Endgame was to take Iron Man and have him go back to Thor: The Dark World to secure the Tesseract.
Even Chris Hemsworth admits the Thor sequel isn’t the best movie, and many MCU fans would place it at the bottom of their lists.
Avengers: Endgame co-screenwriter Stephen McFeely reveals the movie nearly revisited another Marvel Cinematic Universe movie.
In the end, the creative team probably made the best decision for Avengers: Endgame and where they obtained the Tesseract.