A new report indicates that star Scarlett Johansson could become Hollywood's highest-paid actress with Marvel's planned Black Widow film.

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News surfaced just last week that Marvel Studios has hired screenwriter Jac Shaeffer for the long-discussed solo movie, although there's no indication the project has been greenlit. The Daily Mail now adds fuel to the speculation with an unconfirmed report that Marvel and Disney have reached a $25 million deal that would make Johansson the highest-paid actress for a single movie. Back-end bonuses could push that figure to $31 million.

That would place Johansson ahead of Emma Stone, who was named by Forbes as 2017's highest-paid actress with $26 million, and Jennifer Aniston, who came in second with $25.5 million.

According to the Daily Mail, Johansson has already signed on for the "one-off" feature, reportedly targeted to hit theaters in 2020. The outlet also suggests the actress' agents are negotiating with Marvel to ensure she receives a producer credit, as well as a back-end deal that could see her earn an additional $6 million should the film surpass $900 million worldwide.

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A recent report indicated that Johansson will meet with Shaeffer early next month to chart a direction for the film, suggesting the actress will play a role in its development.

Outside of Guardians of the Galaxy Vol. 3, which has been confirmed for a 2020 release by director James Gunn, Marvel's slate beyond Phase Three is unknown. Should Marvel decide to move ahead with Black Widow, and it seems likely, a 2020 release as reported by the Daily Mail is entirely possible.

Johansson can next be seen as the hero in May in Marvel's Avengers: Infinity War.