I Need To Let This Go - Tumblr Posts
For a good chunk of the episode I was convinced the Jon we were watching was Jon-El in discuise. I was just grasping at straws but, like, it would explain Jon's ragging on Clark about the secret of he was just trying to mess with his alternate self's life to make it either easier for him, once they merge or if he ruined things for Jonathan so he would be less likely to fight the merge cause he had no normal life left, to return to anyway.
Jon reading the letter also seemed like a hint that he was bizzaro. He could have worked out from context clues that Sarah was important but since there was no Sarah in his world he was trying to get more information both to possibly use her as a weakness against Jordan and to make it look like he knew what was actually going on in regular Jon's life.
Jon-El could have pulled it off too. Maybe. He has superspeed and it's not like he's under constant surveillance or anything. He could almost be in two places at once.
I was just waiting the whole episode for a flash to some random basement or something, to see Jonathan tied up, just like Lana.
It would've been a good plot twist, too.