Suppose you’re a writer and you want to write for a rich, established universe. Think Doctor Who, Star Trek, or Star Wars, for example. The question becomes, how do you write something that is original but consistent with all of that backstory?
Let’s stick with Doctor Who for now. The show started over 50 years ago, and although there was that hiatus between 1989 and 2005, that’s still a lot of content. But wait, that’s not all! You also get many books, graphic novels and audio dramas (yay Big Finish!). It’s enough to make your head explode. Unless you’re a Time Lord.
So what’s a poor, human, head-about-to-explode writer to do? Well, we can be grateful that there are websites like http://tardis.wikia.com/wiki/Doctor_Who_Wiki. Here you’ll find just about every fact about Doctor Who that exists. If you search for the Third Doctor, for example, you’ll learn about all his adventures in chronological order across all media. As a resource, this site is invaluable. And yet, there’s still a limit to what you can absorb, and there may be details omitted within a given adventure that contradict something in your writing.
I’m afraid this is one of those posts where I have no brilliant solutions. If you actually owned the property, rather than, say, the BBC owning Doctor Who or CBS owning Star Trek, or Disney owning Star Wars, then you could consider crowdsourcing the story. Put the whole thing online, then act on the feedback you get to make the story better. Andy Weir famously did this with his novel, The Martian, with contributors pointing out sciency things that could use some tightening.
If you’re writing fanfiction, then you can do this by posting the story on fanfiction.net, for example. I posted a very short and hopefully humorous Lord of the Rings story there. Once. It was inspired by a review of one of the Hobbit movies that pointed out that the eagles are a kind of deus ex machina in Tolkien’s writing. As multiple readers pointed out, that premise was fully explored in a YouTube video in which our heroes bypass the whole adventure by simply flying with the ring directly to Mount Doom. Rats. That episode cured me of any further desire to write LotR stories. You’ve really got to know your stuff, especially for that fandom.
Posting content online yourself doesn’t really work if you’re writing commercially for someone’s existing intellectual property. As with most things, I suppose you can only do as much research as you can (and as your deadline permits) and do your best.
PS Have I mentioned that Landbound has been released by Big Finish? Oh.