Where was it ever said JJ was going to do anything past TFA?
That’s not what I was getting at. The important bit from the article is that the story was not set in stone from the beginning. JJ and Kasdan write a chapter, and then Rian Johnson writes whatever he wants to write. And then the next person after him will make up whatever they want to make up. Where does Rey come from? A lot of the unanswered questions that people have from TFA aren’t even known by the people making the movies when they make them. They are just going to retcon over and over again later.