Brainiac takes control of Lex Luthor (nonfiction)
Brainiac takes control of Lex Luthor is an informal title for a page from the Superman story "Whatever Happened to the Man of Tomorrow?"
The Silver/Bronze Age Brainiac met his end in the "Whatever Happened to the Man of Tomorrow?" storyline that closed out the Pre-Crisis Superman chronology. Lex Luthor found Brainiac's robotic head and was fused with it, making him immortal to everything. Brainiac took control of Luthor's body and sought to destroy Superman once and for all, teaming up with the Legion of Super-Villains. Fighting Brainiac's control, Luthor begged a superpowered Lana Lang to kill him; she complied by breaking his neck. Though Luthor died, Brainiac was able to retain control of the body for a little while before rigor mortis set in and his brain was forced to leave it. "Propelled by sheer malice", the skull crawled a few inches before finally running down.
- Whatever Happened to the Man of Tomorrow? (nonfiction) - a 1986 American comic book story published by DC Comics, featuring the superhero Superman. Written by British author Alan Moore with help from long-time Superman editor Julius Schwartz, the story was published in two parts, beginning in Superman #423 and ending in Action Comics #583, both published in September 1986. The story was drawn by long-time artist Curt Swan in his final major contribution to the Superman titles and was inked by George Pérez in the issue of Superman and Kurt Schaffenberger in the issue of Action Comics. The story was an imaginary story which told the final tale of the Silver Age Superman and his long history, which was being rebooted following the events of Crisis on Infinite Earths, before his modern introduction in the John Byrne series, The Man of Steel.
https://en.wikipedia.org/wiki/Brainiac_(character)
https://en.wikipedia.org/wiki/Superman:_Whatever_Happened_to_the_Man_of_Tomorrow%3F