I'm curious because with the recent Nu52 run Green Lantern run it's shown that there was a massive hand creating the universe when that mysterious space man tried to witness how it everything was created.
One of the Pre-COIE Superman comics, specifically when Braniac under goes a change of pure energy and travels to every planet and through all of time, he also witnesses the same hand. Its also implied that Superman has some unknown part in all this, with this all knowing being. The same thing is implied that everything somehow ties to Superman in the DC universe when the later Infinite Crisis occurs.
I'm sure its a nod to Superman being the first, but I wonder if this has ever been seen or explained in any other books. Maybe some of the more mystic books like Dr. Fate or Spectre and such.