(ETA: still thinking about this!)
I'm going to have to be careful if I don't want to include excessive backstory. And then Peter Chung
argues, pretty convincingly IMO, that all backstory is irrelevant:
"...art's function is to exercise the mind's capacity to find meaning. Meaning is not something innate in the world. It exists only because there are conscious minds alive which are eager to create it. I'm not talking about something esoteric and rare. This is the most basic, most universal trait of being human.
The point is that: don't focus on the fictional events themselves. Focus instead on how your mind is working to find meaning in those events. You can discard the fictional events. The workings of your mind is a fact. Your mind's capacity to find meaning is what makes you human. The question of which fictional character ended up loving/ killing/ sacrificing themselves for which other fictional character is just the stimulus intended to trigger your mind's workings. The experience of art is the appreciation of becoming aware of your own mind's capacity for creativity, empathy and insight. Focusing on the fiction is enjoyable, but it's escapism.
If you remember from the Monican Spies interview- "backstory is a trap". Informing the viewer of the (Aeon Flux) movie that the story takes place 400 years in the future, that there are X number of people alive, etc. are a distraction, because viewers will try to cling on to these made-up bits as if they mean something. They mean nothing. Such information takes away, it does not add."