“Mufasa: The Lion King” is an origin story about the young Mufasa (voiced by Braelyn Rankins), center, with his mother (Anika Noni Rose), left, and his father (Keith David).

The first reactions to Disney‘s “Mufasa: The Lion King” have started pouring in on social media, and members of the press are roaring with excitement over the prequel to the 2019 ...