I don't think this is working. I just
can not accept the visiting Superman's story. If he is Clark he knows how much confusion there was and would never cast himself in the role of a rival.
Also he is not helping Clark but feeding Clark's paranoia. Like trying to teach a child to ride a bicycle by knocking him down. Over and over. Cruel and harmful.
Yet from the bits about how Martha and Jonathan are different in his home Verse this visiting Superman must be Clark.
So what is his REAL motive? Is his Lois dead? Has Tempus messed with his mind?
Or is it like a card trick, the author has us all looking at the wrong card?