Here's a house ad from 1962 DC comics. Ironically, it's correct, too! Within the last few months, the very stories of these characters that were being plugged in this ad have been reprinted in the current SHOWCASE series of phone-book size collections. First AQUAMAN, then HAWKMAN, ATOM just a couple weeks back and now METAL MEN recently announced as coming soon! All 45 years past this precognitive ad!