According to The Hollywood Reporter, the film is about a man who has managed to stay alive for hundreds of years.
The project, which hails from Warner Bros, has been in development for many years now. At one point, superstar Tom Cruise was attached for the lead part.
Watts is currently working on "Spider-Man: Far From Home", the sequel to the 2017 film. Featuring Tom Holland in the title role, the movie will release in July this year.
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