Disney shared a new trailer for Mufasa: The Lion King, which shows how Mufasa and Scar’s relationship changed from brothers to enemies.

Directed by Barry Jenkins, the music-filled film serves as both an origin story and follow-up to Jon Favreau’s 2019 The Lion King, which was based on the 1994 Disney animated classic of the same name. 

The official logline is as follows: “Mufasa: The Lion King enlists Rafiki to relay the legend of Mufasa to young lion cub Kiara, daughter of Simba and Nala, with Timon and Pumbaa lending their signature schtick. Told in flashbacks, the story introduces Mufasa as an orphaned cub, lost and alone until he meets a sympathetic lion named Taka — the heir to a royal bloodline. The chance meeting sets in motion an expansive journey of an extraordinary group of misfits searching for their destiny — their bonds will be tested as they work together to evade a threatening and deadly foe.”

Aaron Pierre voices Mufasa, Kelvin Harrison Jr. voices Taka, a lion prince with a bright future who accepts Mufasa into his family as a brother. Billy Eichner and Seth Rogen will return as Timon and Pumba. Donald Glover reprises his role as Simba from the 2019 film; Tiffany Boone as Sarabi; Kagiso Lediga as Young Rafiki; Preston Nyman as Zazu; Mads Mikkelsen as Kiros, a formidable lion with big plans for his pride; Thandiwe Newton as Taka’s mother, Eshe; Lennie James as Taka’s father, Obasi; Anika Noni Rose as Mufasa’s mother, Afia; Keith David as Mufasa’s father, Masego; and John Kani as Rafiki.

Additional casting includes Braelyn Rankins, Theo Somolu, Folake Olowofoyeku, Joanna Jones, Thuso Mbedu, Sheila Atim, Abdul Salis and Dominique Jennings.

Mufasa: The Lion King will release in theaters December 20.