Superman, Vol. 1

Superman finds himself in a world whose “Superman” is a Superwoman, teamed with a blonde Superboy and a male “Wonder Woman” named Wonder Warrior, all of whom regard Superman as a dangerous criminal. Upon further investigation, Superman realizes that he hasn't been transported to a gender-flipped world, as he sees Superwoman and her supposed alternate identity Clara Kent as two actual separate people. From looking at a selection of photos comprised of Superwoman's mortal enemies, Superman ascertains that it is Mister Mxyzptlk who has transformed Superman's world to make it so that his girlfriend Lois does not exist in it, as she has been transformed into Louis Lane -- the obvious clue being that Mxyzptlk was too vain to present a gender-flipped version of himself. Mxyzptlk reveals that it was out of jealousy for Superman having a happy loving relationship with Lois Lane while he suffered a marriage with a fellow Zrfff female who used magic to make herself more beautiful than she actually was, which was soon quickly annulled. Using Wonder Warrior's magic lasso which he had taken while struggling to get himself out of a trap set up for him by Superwoman and Superboy, Superman forced Mxyzptlk to undo the gender flipping by saying his name backwards, sending him back to the Fifth Dimension. At the end of the story, Clark Kent meets up with Louis Lane at the Daily Planet, with Lois revealing that Louis is her cousin.