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Black Widow is a 2021 American superhero film based on Marvel Comics featuring the character of the same name. Produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures, it is the 24th film in the Marvel Cinematic Universe (MCU). The film was directed by Cate Shortland from a screenplay by Eric Pearson, and stars Scarlett Johansson as Natasha Romanoff / Black Widow alongside Florence Pugh, David Harbour, O-T Fagbenle, Olga Kurylenko, William Hurt, Ray Winstone, and Rachel Weisz. Set after the events of Captain America: Civil War (2016), the film sees Romanoff on the run and forced to confront her past.

Black Widow premiered at events around the world on June 29, 2021, and was released in the United States on July 9, simultaneously in theaters and through Disney+ with Premier Access. It is the first film in Phase Four of the MCU, and was delayed three times from an original May 2020 release date due to the COVID-19 pandemic. Black Widow broke several pandemic box office records and grossed over $379 million worldwide, becoming the eighth-highest-grossing film of 2021. The film received generally positive reviews from critics, with praise for the performances, particularly those of Johansson and Pugh, and the action sequences, though the villains received criticism. In July 2021, Johansson filed a lawsuit against Disney over the simultaneous release, which was settled two months later.

In 1995, super soldier Alexei Shostakov and Black Widow Melina Vostokoff work as Russian undercover agents, posing as a family in Ohio with Natasha Romanoff and Yelena Belova as their daughters. They steal S.H.I.E.L.D. intel and escape to Cuba where their boss, General Dreykov, has Romanoff and Belova taken to the Red Room for training. Years pass, during which Shostakov is imprisoned in Russia while Romanoff defects to S.H.I.E.L.D. after bombing Dreykov's Budapest office and apparently killing him and his young daughter Antonia.

In 2016, Romanoff is a fugitive for violating the Sokovia Accords. She escapes from U.S. Secretary of State Thaddeus Ross and flees to a safehouse in Norway supplied by Rick Mason. Meanwhile, Belova kills a rogue former Black Widow but comes in contact with a synthetic gas that neutralizes the Red Room's chemical mind-control agent. Belova sends antidote vials to Romanoff, hoping she and the Avengers can free the other Widows, and goes into hiding. When Romanoff is unknowingly driving with the vials in her car, Red Room agent Taskmaster attacks her. Romanoff escapes from Taskmaster and realizes that the vials came from Budapest. There she finds Belova who reveals that Dreykov is alive and the Red Room is still active. Black Widows and Taskmaster attack them, but Romanoff and Belova evade them and meet with Mason, who supplies them with a helicopter.

Black Widow Family has not been a contender in any CBUB matches.