Marvel Studios might be going back to fill in more open space in the MCU timeline. After exploring World War II in Captain America: The First Avenger, a new rumor has the studio filming something set in the years of World War I. This sequence would most likely be part of Black Widow.
The rumor comes from the Italian newspaper Il Saviglianese via BadTase.it. According to Il Saviglianese, Marvel Studios will be filming scenes in Italy for the third time between April and May of next year. Marvel also shot scenes for Avengers: Age of Ultron and Spider-Man: Far From Home in the country.
The report has a future Marvel movie filming in an around the Racconigi castle in the Cuneo province. Il Saviglianese reports that the director of the film was there (but failed to identify which director it was) and that the sequence will be set in the years of World War I, including the attack on Sarajevo.
All of this information suggests the scene will be part of Black Widow, as that film is set to begin production in the first half of 2019 for a May 1, 2020 release. History buffs will recall that the attack on Sarajevo in 1914 included the assassination of Archduke Franz Ferdinand of Austria, which is credited as the inciting incident of World War I.
Remember that Natasha Romanoff (Scarlet Johansson) was not the only assassin we saw being trained in the Red Room in Avengers: Age of Ultron. There were others and if this rumor holds up, then the network of assassins of which Black Widow was part will be traced back to the first World War, or perhaps even further. The film’s main antagonist might have been directly involved in the assassination of Archduke Franz Ferdinand, for all we know.
There is still a chance this sequence is for The Eternals, as the main characters have been around for much longer than just the start of World War I. Like Black Widow (Cate Shortland), The Eternals has a director attached in Chloé Zhao.
As described in this rumor, though, I doubt this scene is for The Eternals. The assassination makes more sense for Black Widow and all signs point to The Eternals not starting production until months after the April/May window for this filming location.