Anchorhead said:

It reads to me as though that was his idea for Star Wars III, so that they can both still be in Star Wars IV.

Baron is correct. People were coming up with stuff regularly back then. Everyone involved had a take. It was all just guessing.

The article is a perfect example of what it was like for us before the internet. You got your nerd news in small newspaper & magazine blurbs, and you took whatever you could get your hands on. And you saved it in a drawer, to reread constantly - at least I did. Nerddom moved at a snail's pace back then.

Yes, he is speculating about Star Wars III and IV. He just guessed right about TESB's revelation (except that Luke's father wasn't "long lost").