* ActingForTwo: Christopher Reeve in the junkyard fight.
* BTeamSequel: To the Creator/RichardDonner-helmed ''Film/{{Superman}}'' and (more or less) ''Film/SupermanII''.
* OldShame: Creator/ChristopherReeve felt so ashamed about this movie that he swore he'd never play Superman again. It took lots of persuasion to bring him back for ''Film/SupermanIVTheQuestForPeace'', which sadly didn't turn out much better.
* {{Promoted Fan|boy}}girl: Annette O'Toole admitted in an interview for the documentary ''Look, Up in the Sky!'' that she loved reading ''Superman'' comics as a child, and preferred Lana Lang to Lois Lane.
* RetroactiveRecognition: So Lana Lang [[CastingGag grew up to become]] ...[[Series/{{Smallville}} Ma Kent!]] Really, Annette O'Toole played Lana Lang here and (unbeknownst to the producers of the TV show) Martha Kent to Tom Welling's Clark.
* TechnologyMarchesOn: In one scene, a computer teachers says you can't do two things at once on a computer. Modern day computer do it all the time.
* ThrowItIn: Reportedly, Creator/RichardPryor was encouraged to ad-lib a lot, but because he was a Superman fan, he mostly stuck to the script.
* WhatCouldHaveBeen:
** According to Ilya Salkind, the original script was going to involve Brainiac and Mr. Mxyzptlk (who would have played by Dudley Moore) teaming up against Superman, who would also meet his cousin, Supergirl, who was adopted by Brainiac.
** The original title for the film was going to be ''Superman vs. Superman''.
** Alan Alda and Frank Langella were both considered for the role of Ross Webster. [[Film/SupermanReturns At least Frank got a role later.]]
** Gus Gorman was meant to be the human guise of Brainiac.
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