Vartox Redux
It seems that Vartox led a life that was a series of unfortunate events.
He makes a final farewell cameo appearance in "Whatever Happened to the Man of Tomorrow?" ACTION COMICS 583 (September 1986) by Alan Moore, Curt Swan and Kurt Schaffenberger. He's shown on page 5 and page 22 of the story--on that last page, he's cradling the dead Lana Lang in his arms.
There doesn't seem to have been anymore that was done with Karb-Brak or the other super-beings of his unnamed planet. Too bad, as they were funny looking aliens and another planet of super-people could always come in handy.
Post-Crisis/Post-Flashpoint/Post-Rebirth, there have been a few Vartoxes (or Vartoces?), but I haven't done any deep research on them. They don't have the extreme powers of the original and seem to be boors. In the classic stories, he was a manly man, but he was always a well-mannered fellow when he was in his right mind. Superman had a great respect for him as a hero. It doesn't seem like the various attempts to revive Vartox have demonstrated the same admiration for the character.
He also seems to have gained a widow's peak; whereas, classic Vartox had a receding hairline with no widow's peak. I can't stress how important this distinctive receding hairline is to the character--it makes him a much more sympathetic person! [It's more of a James Caan receding hairline than a Jude Law receding hairline, if you catch my drift.]
POWER GIRL (second series) 7 (February 2010) had a cover by Amanda Conner and Paul Mounts that mocks the classic Nick Cardy cover for SUPERMAN 281 (November 1974).