In the past, I've written several times about the villains from the DC Superman comics who should have shown up in 'The Adventures of Superman' and then suggested the actors of that time who could have played the roles. And I also had a suggestion for Supergirl as well:
- Lex Luthor - RG Armstrong
- Brainiac - Michael Ansara
- Mr. Mxyzptlk - Billy Barty
- The Toyman - Ed Wynn
- Supergirl - Cheryl Holdridge
But I didn't give much thought to other characters who could have shown up in the course of the series.....
This picture, of course, is just pure fantasy though. The comic book Power Girl was not created until 1976, almost two decades past the show's run. ('The Adventures Of Superman' ran until 1958.)
Supergirl was around, but as I've pointed out above, I already have a candidate for that role.
If Power Girl had been around, and we wanted the fantasy to be played out with Marilyn Monroe, she would probably have been available for a one-shot guest appearance only during the first two seasons. I think it was with "Niagara" in 1953 that her career in the movies really blossomed, although she had quite a few small showcase roles in movies like "All About Eve" and "The Asphalt Jungle". Once her film work took off, it would have been impossible to get her for the role.
However, Joi Lansing - who played Sgt. O'Hara in one episode (and who gave birth to Superman's child in the Secret Back-story of Toobworld) - could have returned as Power Girl... if the character had existed back then, of course.
Just sayin', is all......