Here’s my thinking on this.
People will get a chance to add stories to the prerequisites for a story. There’s no need to add multiple stories in the same sequence though, for example:
Let’s say you’re editing Hell Bent. You choose Heaven Sent as a prerequisite.
Heaven Sent already has Face the Raven as a prerequisite for that story, so no need to choose that as well.
So once added, the Hell Bent story now has a graph of stories in a kind of flow chart, and says “before completing this you should complete:”
Face the Raven → Heaven Sent → Hell Bent
Then I’d let people vote a simple yes/no on the prerequisite, if they think it applies. If something gets heavily downvoted it will be hidden.
The difficult part is what is a prerequisite for Face the Raven? It’s kind of “all of Clara’s stories” for context of how she is becoming like the Doctor. But if we do that, then pretty much every story will just say “you need to do them all in order”.
We did discuss there being different levels of prerequisite: Required, Suggested, Enhancements.
Let’s take another example.
Empire of Death (tv):
Required: The Legend of Ruby Sunday
Suggested: Pyramids of Mars? Or is that an enhancement?
The Legend of Ruby Sunday:
Required: The Church on Ruby Road?
Suggested: Pretty much all of Season One?
Enhancements: can’t think of any?
I think suggested/enhancements might be too similar, maybe we just have required and suggested?
As well as voting up and down, should we have a way to vote which category something goes in?
This is a difficult one!