A new Golden Age comic (sort of)
He is considered the first and the greatest among the costumed superhero set. And yet, despite being in print for 78 years, a gifted writer and/or artist can still come up with a new angle.
In this case, it's a look at Superman before he was Superman, and the hidden story behind his costume and the concept of a secret identity. It's a fan comic by a storyboard artist, and it's a great glimpse into the untold history of Superman.