There's a question on the main site here, asking "Are the movies 'The Fantastic World of D.C. Collins' and 'Cloak and Dagger' connected somehow?"
I created cloak-and-dagger for the latter film, which is fine.
The former film is too long for a tag. I've created fan-world-dc-collins which is extremely clunky, but I'm not sure what else this could reasonably be reduced to.
What are people's thoughts on the best tag for this?