Everybody knew about Superman by the 1970's, after the Man of Steel had died (in Earth Prime-Time), His secret identity as Clark Kent, the identity of his birth parents, what planet he was from, the Fortress of Solitude, the bottled city of Kandor. And his relationship with Lois Lane was known as well. (I think we can blame Jimmy Olson for spilling the beans. He probably wrote a tell-all best-seller as "Superman's Pal"....)
A book like that would be the easiest splainin as to how the whole world knew the secrets of Superman after he died. Here are four examples of what the people knew:
1] Jerry Seinfeld used "Jor-El" as his bank PIN code.
2] Luke Ross would often say he was from Krypton (because that's what his father once told him.)
3] George Costanza once mentioned the Fortress of Solitude to a Mister Ross. (Mr. Ross may have been related to Luke and Emma Ross.)
4] Leonard Hofstatder has a model replica of Kandor. The real one was unleashed by Superman (with help from the Doctor?) on an otherwise uninhabited planet.
At the time that Emma mentioned Miss Lane, Lois was still alive in Earth Prime-Time. (Although she was not originally from Earth Prime-Time - Superman brought her over from an alternate dimension in the Cineverse.) I think she founded the Kent Foundation in memory of the man she loved.
If the detail about Miss Lane hating Superman underwear is true, and if it did come from a book by Jimmy Olson, I wonder if it caused a fissure in their friendship?
SHOWS & MOVIES CITED:
- 'The Adventures Of Superman'
- 'Jessie' ("Punch-Dumped Love" & "Gotcha Day")
- 'Seinfeld' ("The Secret Code" & "The Cheever Letters")
- 'The Big Bang Theory' ("The Cooper-Hofstadter Polarization")
- 'The Twilight Zone' ("The Little People")
- 'Law & Order' ("C.O.D.")
- 'Doctor Who'
- "Atom Man vs. Superman"
Up, up, and away!