Then there is the so-so, which is a satire on Captain Marvel, “Captain Marble Flies Again,” done for Premier’s Nuts!#5 (1954), after Captain Marvel was cancelled. The story has its moments, but it depends on your tolerance for this type of satirical treatment. (It has a hooker under a street light putting the moves on Captain Marble; that’s interesting and solidly pre-Comics Code).
You remember another story done for Mad #4, “Superduperman” (below) featuring Captain Marbles and Superduperman in battle. It was a reference to the lawsuit against Fawcett by DC for copyright infringement, which which was ultimately decided in favor of DC. Go to Apocolyte’s World of Comics for the Mad story and some bonuses.
Ross Andru drew “Captain Marble Flies Again.” He and partner Mike Esposito published their own short-lived satire comic, Get Lost!. I wonder if this story was originally something they had prepared for that book.