Never assume that your own knowledge base is universal. A couple of decades ago, I flew out to LA to pitch to
Deep Space Nine and stayed with my cousin, who'd been working in Hollywood for decades (he ran a company that provided bike, skateboard, and roller-skate stunts to Hollywood productions). At one point, I was talking to him about how I hoped I could parlay my DS9 pitch into an opportunity to pitch for
Voyager -- and it came out that he was unfamiliar with both shows and had no idea they were both part of the
Star Trek franchise. I'd just assumed he had to know about the various Trek series, that it was basic common knowledge, but he didn't have a clue, despite actually working in the industry.
Besides, Neil Gaiman is a very well-known name, an accomplished novelist, comic book author, and screenwriter with
a ridiculously long list of awards and honors to his name. Productions adapted from his books and comics include
Stardust, Coraline, and the current
Lucifer TV series, and
American Gods is just one of several Gaiman-based projects that are in development for film or TV adaptation right now. He's written for
Doctor Who several times, and he's written screenplays including
Beowulf, Mirrormask, and the English dub of
Princess Mononoke. He's probably more famous than anyone involved with
Star Trek: Discovery is, quite frankly. Just as a rough comparison, Gaiman's name gets 23.9 million Google hits, while Fuller's gets only 9.2 million, Nicholas Meyer gets 19 million, Alex Kurtzman gets a bit over half a million, and even Michelle Yeoh gets less than a million.
American Gods gets 13 million hits, while
Star Trek Discovery gets barely a million. Granted, a lot of that would be false positives, but even so, it's safe to say that
American Gods is not some obscure, unknown thing in the SF/fantasy community. It's a major, prestigious project.