Nobody wants to see a Mufasa and Scar prequel and I actually face palmed as I was watching John Campea earlier actually pitch that idea like it was something exciting lol.
I haven't delved too deeply into this in a very long time, but a Mufasa-Scar backstory is one of if not the biggest storylines that at least the litany of hardcore
Lion King fans have wanted to see for literal decades now. It's probably one of the most-covered subjects in the franchise's fanfic community; there was even a dance show (
The Lion King - A Brothers' Tale) based on it that was very well received over its very limited run a few years back. Cheesy and kiddie fare as the show often was, even the
Lion Guard episode that actually gave Scar something of a proper canon backstory (canon to the cartoon universe anyway) got a surprising amount of media coverage last year because of it. (Of course, the episode also premiered in the wake of the Favreau film hitting theaters, so there was that boost as well.)
Obviously the prequel portion won't be the whole of the film, but it's one of the few things I think the 2019 movie did well in setting up; the way the relationship is played between Mufasa and Scar hints at a more personal and deeper history than the cartoon's (at least initial, before
The Lion Guard added things) more overt big good, big bad dynamic. Not to disparage the original of course, I just think there's ample material in the remake's portrayal for any decent writer and a director like Jenkins to run with. (Surely that's at least partly why they announced the prequel bit without giving any hints for the actual sequel portion, as it's the part someone saw fit to be most excited about.) But we'll see...
The biggest drawback to this for me honestly is just whether they'll get James Earl Jones back if they feature "young man" Mufasa, which I assume is where the meat of that story would lie. I love him and didn't mind his 2019 reading, but it's clear that he doesn't have the oomph to play a younger role. Perhaps someone like Gary Anthony Williams (he's played Mufasa for
The Lion Guard and sounds pretty decent) or Avery Brooks (he's even got a nice singing voice in they give Mufasa a song)...?