Today we don't even have so much as a title for Star Wars Episode IX that might give us a hint of what we're in for when the movie arrives at the end of the year. We don't know what we're going to see, but at least one person does, as Adam Driver recently revealed that he's had one piece of information about the end of the trilogy since back when it started. According to Driver...
With Star Wars, I had one piece of information of where it was all going, and that's where it has been in my head for a long time, and things were building towards that.
Driver's comment, that he has known where it was all going, would certainly seem to indicate there's been a method to the Star Wars madness all along. All indications had been that this new Star Wars trilogy was being handled like a relay race, with writer and director J.J. Abrams given more or less free reign to write Star Wars: The Force Awakens, before handing things off to Rian Johnson to do the same with Star Wars: The Last Jedi.
However, this comment to Deadline would indicate that there was some idea where this trilogy was going back when it started. That doesn't mean that every plot detail along the way had already been devised, but there certainly seems that there was some sort of an idea where things would end up back then, otherwise, Adam Driver couldn't have known.
Of course, Driver also says he only has "one piece" of information, so it's possible that he may only know part of the end of the story. He doesn't specifically say what that piece is in regards to, it's easy to assume that he may know the final fate of Kylo Ren in Star Wars Episode IX, but he stops short of actually saying that. It's also possible that the "one piece of information" is actually just the ending of the entire trilogy, so he may know the fate of everybody.
One assumes that Adam Driver got his information from producers Kathleen Kennedy and/or JJ. Abrams, and while Abrams is now directing Episode IX that wasn't always supposed to be the case. The final episode of the trilogy was originally going to be in the hands of Colin Trevorrow, so unless Trevorrow had already worked out an ending, that J.J. Abrams has decided to keep, it would seem that Lucasfilm has known from the beginning where this whole thing would end.
The rest of us have pretty much exactly 11 months to wait to find out how all this ends. Star Wars Episode IX will hit theaters December 20.