Scarlett Johansson: Black Widow Return to the MCU Would Be a “Miracle” – The Hollywood Reporter

Scarlett Johansson addressed then rumors that Black Widow could be returning to the MCU, noting that it would be a "miracle" but didn't deny it.

Scarlett Johansson – Metro

It would be a miracle': Scarlett Johansson addresses rumors she might return to MCU as her superhero character

Marvel Phase 4 Timeline & Movies List What We Learned from Comic-Con – SheKnows

Marvel Phase 4: Forthcoming MCU films get new release dates – full list here, The Independent

Marvel Cinematic Universe – Wizard Dojo

Natasha Romanoff (Marvel Cinematic Universe), Ultimate Pop Culture Wiki

Scarlett Johansson Black Widow Return? Actress Answers And Shocks Fans

Scarlett Johansson says it would be a real 'marvel' if MCU could bring back Black Widow

Natasha Romanoff - News - IMDb

Scarlett Johansson – Metro