Yasuke

According to IMDb, a Yasuke film was planned, and would have focused on the story of the real-life samurai of the same name, but was later cancelled due to lead actor's Chadwick Boseman's death on August 28, 2020.

Plot
The film was supposed to be based on the true story of Yasuke, the African Samurai.

Why It Was Cancelled

 * 1) The COVID-19 pandemic affected the film's production.
 * 2) Chadwick Boseman died on August 28, 2020.

Results

 * The Chadwick Boseman version was permanently cancelled after his death on August 28, 2020.
 * The current version will instead be an anime on Netflix instead, with Get Out, Sorry to Bother You and Knives Out actor LaKeith Stanfield taking over Chadwick's role in the anime, rather than live-action.