In the Marvel Cinematic Universe, no one really dies (or in comics, in general).
As a result, character deaths are only as realistic as the actors portraying them make them.
We all know that if Robert Downey Jr. desired to be resurrected, he would most likely do so.
RDJ, on the other hand, claims to be done with the MCU. Scarlett Johansson, it appears, is as well.
In an interview with Fatherly, Johansson stated that she “had no plans to return as” Natasha Romanoff.
“I’m incredibly happy with this movie,” she said of Black Widow. “It feels like a fantastic way to end this chapter of my Marvel persona.”
Johansson may, however, still have a position at Marvel. She has the ability to direct, produce, and even write.
“I’d want to continue collaborating with Marvel in different ways,” she said, “because I believe there’s such an unbelievable wealth of tales there. Reimagining this genre is something I’m particularly interested in.”
In a recent interview with Entertainment Tonight, Kevin Feige also left the door open for Johansson.
“Marvel is always about new beginnings,” he explained, “and Scarlett Johansson is such an incredible partner for us. She worked on [Black Widow] as a producer. She was the one who introduced us to Cate Shortland, our wonderful director. If we’re lucky, I’m looking forwards to continuing to work with her in any manner imaginable.”
— leonor²⁸ ♡'s you (@ot5hzllnry) July 10, 2021
— ray | black widow era (@everrmoree) July 10, 2021