Theory that went literally nowhere (S3E4)
So after watching this new episode, a thought came to mind which made sense at first, until I thought about it for more than a minute.
My initial thought process was that Jon was sent back to save his father's life and prevent the Cyborggedon (you can have that one for free). But if Superman was supposed to die, but Jon was still born… does that mean Lois is already pregnant?
But then I remembered that Jon had a photo of Baby Jon with both of his very-much-alive parents, not to mention the possibility that something caused these events to happen much sooner than anticipated.
TL:DR My own theory was debunked by me.