First a caveat: since 1977, Star Wars creator George Lucas has had a long history of making statements about his plans for future Star Wars films that do not pan out. He is, to put it politely, something of an improvisational artist.
That said, Lucas' apparent original plan for the sequel trilogy (the movies that became The Force Awakens, The Last Jedi and the upcoming Episode IX) is an eye-opening one, even for him.
As far as I've seen, these are the first specifics George Lucas has shared about what his vision of Episodes 7-9 would have been. This comes from @insighteditions awesome companion book to "James Cameron's Story of Science Fiction series" on AMC: pic.twitter.com/Wtlw8zlrqv