>If you're looking for immediate gratification along these lines, John
>Biles has a well-written NGE/Cthullu cross-over ongoing series
>(http://www.thekeep.org/~rpm/eva/coaeg.html). I've had much enjoyment
>comparing the divergence in story between EPU's Evangalion universe to
>Biles. Beware however that the NGE/Cthullu take is (unsurprisingly)
>much darker in tone than NXE.
>
>Brian
>
>While Eris is competent, for real Chaos seek Arioch.
>
>Blood and Souls!!

Definitely darker. But definitely interesting.

And, just to keep things completely and utterly weird, Dan Gibson has gone ahead with a little bundle of joy called Sic Semper Morituri, which takes some of John's ideas and runs wild with them, adding some characters to the cast, and setting the whole thing in 1947 Occupied Japan.