It was a collection of comics, not just of Shadow, that showcased something special about each character. I'm not knowledgeable about the comics, but I think it the artstyle resembled Archie. Each comic was a page long I think, and the Shadow comic was about how Maria gave him his name, that it didn't mean he was a dark being but that he is a shadow because he shows the way the light is. I don't know where I saw this, probably twitter. I think it maybe was for an special event. I tried googling for it because obviously with this much information sure I could have found it, but nope, any string of keywords just didn't do it. I tried here in the forums too, but to no avail. I might have miss it.