Getting back on topic...
What's the 'window' for writing a trillogy like Rebels anyway? Was it approved and mostly written before the final season showed how bad Kai Wynn was?
There's usually a considerable lead time, except for "rush" projects like movie novelizations.
Just for example, I wrote The Weight of Worlds
(which went on sale this week) last summer during a heat wave . . . and the outline had been approved weeks or months before I started writing the book. (I had a few other projects I needed to finish up first.)