From the article (emphasis mine):

The deal is rare one, coming after a competitive situation which saw Sanderson meet with most of the studio heads in town. It gives the author rarefied control over the screen translations, according to sources. Sanderson will be the architect of the universe; will write, produce and consult; and will have approvals. That’s a level of involvement that not even J.K. Rowling or George R.R. Martin enjoys.

By the Almighty's Tenth Name, please, Apple, don't mess this up!