I've always thought that Clark Kent should be Jewish (as a nod to his creators). If I had control over his history, I'd have Jonathan Kent be Jewish and Martha Kent be a Protestant. In fact, I have an entire backstory for that idea.
Well, a friend of mine did a story like that about Kal-El long lost brother Sar-El. I have a copy of the comic right in front of me.
Interesting. One thing I've always wanted to do is explore Superman's religious beliefs (both Terran and Kryptonian). I've come up with some different forms of Raoism (Classic, Neo, Helio, and Machina) and a religion based solely on Kryp and Tonn.
ya wanta read it?
Be warned, it uses the dreaded Bryne Krypton, but frankly the story wouldn't work using the Sliver Age version.
It would be a fun story to have on this site.
But that would be up to the Great one.