In Action 492 (Feb. 79), Bates, Swan and Chiaramonte take Superman on a mystifying journey through his future life.
Superman encounters an anomaly in space, which sucks him in. He then believes that he is waking up back on Earth, but we know that this is some psychological game being played on him.
He experiences a death-trap set by Luthor, with Lois and Lana in separate capsules shot into space. He saves Lana, but Lois dies. General Zod, Jax-Ur and Faora are behind this, hovering at the sides of the hallucinations as minor characters.
They keep taking Superman further into his future, and have him believe that he enlarged Kandor. Having every event be a bad one might make him realize he is being played. I like that touch.
We see that the villains are really still in the Phantom Zone, and Superman is having his life drained by the anomaly. This line-up of Phantom Zone villains, Zod, Jax-Ur and Faora, is the closest that had appeared in the comics, to the Phantom Zone villains in the movie, about to come out, General Zod, Non and Ursa.
They make Superman imagine a future in which he and Lana are married, with children. And Superman kills them all accidentally with a space virus. This is meant to prompt him to kill himself, but that is what takes him out of their trance. He would never willingly kill, not even himself.
Free of the anomaly, he leaves the Phantom Zone villains to curse fruitlessly.