Despite the finality of Natasha Romanoff's fate in Avengers: Endgame, the Marvel Cinematic Universe will see her again in the upcoming Black Widow. Fans have not stopped guessing as to whether or not this film will allow the master spy to continue existing in the MCU and theorizing about how Widow could have survived if it does.
Black Widow star Scarlett Johansson appeared on The Tonight Show Starring Jimmy Fallon recently and addressed these theories. She began by saying, "death is pretty certain," before explaining how some fans seem to continue to deny that facet of the MCU. She stated, "But [people] definitely don't believe it and have tried to convince me that my character did not actually die -- that maybe my character exists in an alternate universe -- but no, I think death is a pretty final thing."
So it seems that Johansson herself is certain that Black Widow will not return from the dead. As she stated in the interview, death in the Marvel Cinematic Universe seems to be fairly final for most, if not all characters. Natasha perished in the third act of Avengers: Endgame, sacrificing herself on Vormir so that the Avengers could acquire the Soul Stone.
Her upcoming film is set some years before, just after the events of Captain America: Civil War. Evidently, the film will deal with Romanoff's past in the Red Room and involvement in S.H.I.E.L.D. It has also been reported that the film will feature an appearance by another fallen Avenger -- Iron Man, though details of that appearance, as well as the rest of the film, are scarce.
Directed by Cate Shortland, Black Widow stars Scarlett Johansson, David Harbour, Florence Pugh, O-T Fagbenle and Rachel Weisz. The film arrives in theaters on May 1, 2020.