In Avengers: Endgame we saw Black Widow sacrificed her life to get the soul stone, but we know for a fact that there's a Black Widow movie in development from Marvel and supposed to release in 2020 but in Endgame she dies.
We know the future of Black Widow now. How is Marvel planning to set the storyline for this character? Hulk also said that he tried to bring her back but he couldn't.
In alternate timelines and prospects of that character being reintroduced in universe with some other capacity possibly but I think the key was really the moment where her father's name was uttered and she said "I didn't know that was his name". That seems to be priming for us I guess.