Vader turning back to the good side and joining forces with Luke resolves their situation.
He is saying that the actual concept of the third trilogy itself, not its plot or any specifics but the actual notion of the possibility of them existing in any form was a fabrication of the media. Clearly its not though. I think this boils down to it feeling that way to Lucas since he never had any real plans or attachment to the third trilogy, and in Bantha Tracks May 1980 even admits to adding it only because of the success of Star Wars.
See I don't remember him saying all of that. You guys are so bent against Lucas, that you assume your assumptions are the cold hard truth, and it's really pretty ridiculous if you ask me.I say he meant he never did come up with more story than what we got in the 6 film cycle. That originally the story would have been extended so that Anakin and Luke take a whole trilogy to beat the Emperor once Anakin turns back to the good side.
Sometime during the production or post production of Empire, he decided he woudn't live long enough to make 3 trilogies, so he cut the story down into 6, and he took the final resolution of Anakin and Sidious biting it, and put it on the end of ROTJ.
Therefore, there is no longer any more story to tell in a 3rd trilogy, and the idea that Lucas has 3 more films planned out just simply isn't true.