The upcoming Disney movie, Mufasa: The Lion King, has the opportunity to answer several questions left unanswered by the original movies—especially regarding Mufasa and Scar's relationship. The film is supposed to follow the events of the 2019 full-CGI remake of The Lion King and bounce back and forth through time as Rafiki tells Pumba and Timon the story of King Mufasa's upbringing. This should fill in many of the gaps that audiences have been sitting with since the 1994 animated Disney movie and add an even stronger foundation for Mufasa—and Simba's—characters.
https://screenrant.com/lion-king-questions-mufasa-prequel-answer/