From a French magazine:
"When I arrived on this new Star Wars trilogy, there was a general plan for the three films. I focused on The Force Awakens, as there was a deadline. I couldn't project myself beyond this film while working on it. Rain Johnson saw what we were making, we had a meeting... He followed his inspiration, but he didn't undo the things we were thinking about. I'm insisting on it. There was a general plan, but no fully written script for Episodes VII, VIII, and IX."
"When I arrived on this new Star Wars trilogy, there was a general plan for the three films. I focused on The Force Awakens, as there was a deadline. I couldn't project myself beyond this film while working on it. Rain Johnson saw what we were making, we had a meeting... He followed his inspiration, but he didn't undo the things we were thinking about. I'm insisting on it. There was a general plan, but no fully written script for Episodes VII, VIII, and IX."