I've read about that before. At the same time, just because the creator had an idea for a long running character doesn't mean it was a good idea.
See, e.g., George Lucas and the prequels.
Really, at some point, the more you diminish the "secret identity" aspect of Superman, the less you have what makes him unique. He basically becomes Martian Manhunter, Capt. Mar-vell, or any of a dozen other super alien characters.
Of course, turning Superman into a generic superhero in the Nu-Marvel/90s Image mode seems to be exactly what DC wants to do.