this is another question of an what if contex, would the jewish god descend into earth and estabilish the trinity if superman was already here? there was a need at that time to reconcile the people through faith, mays be super could be a supporter of christianity and thus inhibiting the suppression, but would paul exist as a apostle?, if pax suprema used superman's feat as a way to enforce his state religion would even judaism or other religion even exist? he could very well end up being diana's enemy because a divine command and she is their champion, or be forced to marry her (despite lois or kara) for the sake of legitimate the religion demigodlyng despite being counterparts
you could even have two or more totally independen universes coincidentally happening in the same period of time