I heard once that when Levitz was President of DC (or whatever the title was), he deliberately held back on reprinting his work on the Legion so as not to be seen as profiting from it more than was seemly, or something to that effect. Not sure if there's any truth to it. I've also heard that Giffen blamed Levitz for the Five Years Later version hardly ever being reprinted because Levitz allegedly disliked what he and the Bierbaums did with it. Again, not sure if any of that is true.