Superman's son meets Luthor's daughter. The one from that Weisinger continuity planet where Lex was looked at as a hero.
This issue's Hostess ad features Curt Swan drawing the Joker--always one of my favorite renderers of that character.
Basically, Lex's daughter comes to earth to free her dad so he can save Lexor from a disease he himself planted there in order to get someone to come to earth to rescue him so he could save them. What he didn't expect was his own daughter that he never knew being the one to do so, nor her tricking the Super-Sons into helping her.
After several issues of these PSAs being drawn by Neal Adams, here we get what appears to be Swan and Vince Colletta.