A little late to the party, but I'm working on a hack that introduces a shadowy rival faction called "The Congregation", which is more concerned with purging paranormal activity than trying to contain and study it with a bit of a religious bent.
It will introduce a few new paranormal powers and rewrite departments. It can be run independently, or slotted in as complications for existing ECB missions.
Lots of scope, but I do plan to publish something, now that the deadline's been extended.