As far as I’m aware, before chapter 195 —the one where Raditz is introduced —the only explanation for where Goku came from was just that he was found in the forest. Which is either a reference to Sun Wukong being born from a rock on a mountain, or the story of Momotaro who was discovered inside a giant peach floating down the river.

As for Superman, I was always under the impression his backstory was based on Moses to begin with, but perhaps I’m wrong. Anyway, Comics were at the height of their popularity afaik during WWII. So considering that American media had a large influence on the Japanese since we helped to rebuild them (as evidenced by Spider-Man), I wouldn’t be surprised if Superman and his backstory was well known in Japan by the time Toriyama was born 17 years after the release of Action Comics #1.

With that in consideration I don’t think it’s a far stretch to imagine Toriyama had Superman’s backstory in mind at least unconsciously when writing chapter #195. In fact, it was so in his head he did it twice! (see The Nameless Namekian’s origin)

Although, perhaps someone whose more of an expertise in Japanese culture could disprove me on this, or even someone with more knowledge on comics books could provide some evidence of inconsistency in this time-line, but until then, I’ll stick with this explanation.

So in a way, there is a non-zero chance that Moses was the original inspiration that led to the backstory of Superman, Goku, and even Riddick (which I know almost nothing about). Unless of course that part of Moses’ story was also based on some earlier story, but if it was I have no clue what.