Over at The New Republic, Jane Espenson (writer for Buffy the Vampire Slayer, Firefly and Co-Executive Producer on Battlestar Galactica) talks about the how to broaden the appeal of science fiction and fantasy beyond the niche:
It’s a very specific type of Hero’s Journey, the most potent sub-case. It’s told over and over again, and it works, over and over again. Dorothy Gale, Buffy Summers, Harry Potter, Charlie Bucket, Luke Skywalker, even Peter Parker, they all fit a very specific pattern. They’re living a life, sometimes a fine one, often a troubled one, but certainly one governed by ordinary rules, when suddenly the curtain is pulled back and a whole new world, or a new set of rules of this world, is revealed. And what’s more – and this is the important part – in that new world, they are something special. They are The Chosen One.