Reporting says Brandon has immense creative control.
I'm a little worried about this.
Not because I don't think Sanderson is sane, relatively sensible, or organised or whatever, but for two specific reasons:
1) Sanderson has almost no experience in the industry and this is a huge role.
Really close to none - basically none - because the only thing he's ever done with film is be a "consulting producer" on the WoT TV show, which is a nothing-burger of a role. And this is an insane level of power. So even with the absolute best will in the world, unless Sanderson turns out to have "natural talent" for this, "good instincts" for this, which most people don't, he may well do more harm than good in practical terms. Part of the reason you don't usually give anyone this level of power is that even trying to do the right thing, they can cause an astonishing number of problems. This is James Gunn levels of power, but James Gunn has been making movies as his entire life-goal and main focus for over 30 years, with good results! As compared to having shown absolutely zero interest - he's never even written a script before as far as I can tell!
I do think Sanderson is temperate enough that he probably won't abuse approvals - but I do think he'll want to do his work what he sees as justice, which will likely mean astonishing budgets and timeframes to film these projects, particularly Stormlight. Also, the Stormlight novels show a serious failure of self-editing. It's unclear to be whether this is a choice he's making (which he could also not make) or he sees it as inherent to the nature of the project, but to call Stormlight bloated and full of "filler" would be to quite seriously understate matters. There are 300+ episode animes with less filler (and I do mean filler in the most pejorative sense here, pointless dull adventures and lore-dumps, not "nice to have" thoughtful character-building stuff like most Star Trek "filler" was). And I really wonder if, with such total control, he's going to be willing/able to make the sacrifices necessary to realistically bring a project like that to the screen, because they'll be significant - very significant. Entire characters and plotlines and locations would really need to go to avoid there being multiple hour-long episodes in a row where basically nothing happens. I also really worry if he has final edit approval specifically, because I am really skeptical he's going to instantly understand editing, and bad or sloppy or "No just keep it!" editing can absolutely drop a movie or show from like A to C very easily.
2) He's taking on a ton of work when he's already doing a ton of work.
I see "Oh well he'll cut down from 4 to 6 books!" and so on, but nah, that's not realistic, given the role he's apparently negotiated for, which is like, almost a super-showrunner. I think, that, being real, he's going to have to drop his book output by a whole hell of lot more than 1/3rd if this role is anything but an "on paper" one. He's obviously far more prolific and organised than virtually all other authors, but that's allegedly all him, no ghostwriters etc., so does even have any ability to delegate? Because he'll need to delegate incredibly hard to make a TV show.
Well, this is excellent news. Apple has actually been cutting back on greenlighting new shows, so they must have really liked this pitch. And given that their existing shows range from "pretty good" to "omg, this was amazing," there's a very good chance that this will be a really satisfying show.
Is it though? Is blowing
hundreds of millions (and likely high hundreds of millions at that) on adapting Stormlight - which is kind of a nothing story with nothing meaningful or terribly human to say, at least in the 3000+ pages of books 1-3, a good use of money for Apple? Talk about sound and fury signifying nothing - it doesn't even have the courage of its own conviction, it's literally, literally too cowardly to say "actually enslaving people and putting them in horrific situations is purely evil and people who do it are evil", instead chickening out and going for "Well we should probably not really resist slavers and slavemasters, they're people too, you can't just kill them!" (counterpoint: YES YOU CAN. It is never not okay to kill slavers and slavemasters. That's like saying "Well death camp guards are people too!").
I think the answer is very definitely no, personally. Adapting a lot of Sanderson's smaller works would probably make a lot more sense, and would mean that Apple TV wasn't having to commit like, a very significant part of their entire overall budget to one project.
Mistborn (the original trilogy) is, despite being weird in several easily-fixable ways (mostly revolving about the main character and her boyfriend), and deeply and hilariously afraid of Kelsier (who is actually standing up for real convictions, which clearly scares the heck out of Sanderson), a much stronger story, and making it as a movie or series of movies makes sense.