How about Clark Kent, under another name (not Charles King, since Lois knows that one) writes a Superman movie script. His idea being misdirection?
One could have him inventing the Fortress as seen in the movies.
Explain his human appearance as an alteration of his true form to prevent his appearance from bothering Humans.
Indeed have an early scene in the movie being where this blue semi human shaped monster is reformed by the fortress to look human so he can walk "among them".
Adding in preSuperman super events.
Perhaps a preSuperman scene at a disaster scene where a worker convinces Kal El to assume the Superman role so he can help more effectively.
Set it in season one after Nightfall before Lois is willing to admit being interested in Clark. Plus Clark could write in a husband and wife writing team that is clearly modeled on Lane & Kent.
