Heh. I remember reading this issue at a supermarket (!) back in January 1983, and walking away VERY depressed.
Superman and Lois broke up.
An Earth-2 villian came to Earth-1 and managed to make a fool of Superman.
I didn't read the whole series until the early '90's, but it ended in 1984 (right after they'd pretty much quit multi-part stories--this was about the only hold-over). Batman and Robin were called in and helped Superman out in the final chapter. Vandal Savage escaped to parts unknown, but the world had learned of his true nature first.
Fun story, overall.
Gernot...