Suppose if in Ultrawoman when the Newtrich sisters shot Superman and transferred his powers to Lois,
How about having it transfer his mind and powers,
Clark of course still does Super rescues and does it wearing a superman suit
But he still acts and talks like Superman, even knowing officials's names. In time he and Lois swap back. Clark follows up on. Rescue he did while in Lois's body.
This gives rise to the belief that Superman is really a shapeshifter who borrows the appearance of various humans.