Mufasa: The Lion King finally explains Scar's backstory, with one of the prequel's reveals making this The Lion King line so much more heartbreaking.

Mufasa: The Lion King might be named after the iconic character, but Mufasa isn’t the only one whose backstory the movie explores. Instead, the movie works as sort of a tale of the past told by Rafiki to Kiara,

By the end of Mufasa: The Lion King, the lore of the villain has been changed in numerous ways, including: how he sustained his eye scar; why he grew resentful towards Mufasa’s title as King of the Pride Lands; and, most significantly, his relation to Mufasa .