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!!