I think Hitomi once mentioned a belief/theory that every 'fictional'
universe actually exists, and is 'real' to itself?

Heinlein did something like that in The Number of the Beast.  A good read,
especialy if you like crossovers.

Which is, of course, just a special case of the 'Many Worlds'
interpretation of Quantum Mechanics - which more than saying that every
*fictional* world really exists somewhere, says every *possible* (no
matter how improbable) world exists. So there is a world where everything
is exactly the same, except I didn't write this message. And one where the
only difference is that I actually finished this sen...

     That's the theory I'm using in a currently stalled fic called
Bubblegum Chronos. Funny, I didn't know it was actually semi-offical.
:P
--
Ben Kosse bmk7411@cs.rit.edu
BGC Otaku and worshipper of the Red-Eyed Goddess. Member of ShAS.
Anime, RPG's, computers, poetry (read/write), music (listen/compose).
Author of the Bubblegum Crisis theme pack (see the homepage below).
Homepage with anime and other interests. (http://www.rit.edu/~bmk7411)