Asakiyume mita

I think a good author might be able to make something thematically coherent out of having people who have experienced different kinds of portal experiences meet - but it would be hard, and it would become exponentially harder the more portal experiences you add to the mix.

And I'm not sure that putting together, say, Narnia and E. Nesbit's nonsense worlds would ever come to much - there's no thematic weight to a nonsense world. Although now that I've said this, I think you might be able to do something with Narnia and Wonderland, even though Wonderland is probably the ur-nonsense world. It has some underlying structure to it, I guess?

But - swinging back around again - I'm not sure what a story would gain from that comparison. Maybe the idea of kids from multiple portal stories meeting is the kind of thing that sounds cool but just fizzles into nothing when you actually try it.