A lot of the recent G-Core releases have featured 'small' groups. Those that are a threat, but can be defeated with enough effort. The Eternal Church of Life may just defy that. The Church is one of the Guardian Universe's most widespread factions and one of my favorites.
This product has a myriad of details about the Eternal Church of Life. It fleshes out the Anti-Prime, it's leader and an immensly powerful being in his own right. It also talks about the heirarchy of the Church and how it handles different circumstances. There are stats for all sorts of Chruch member, ranging from simple cannon-fodder types through incredibly potent titans that crush the Anti-Prime's enemies.
Most importantly, there is an excellent backstory about the Church and its leader. Jay fills in the spaces hinted at before while creating a great faction. The Ethernal Church of life can fill all sorts of niches in a campain from a simple threat to an overwhelming power that can destroy the universe.
Well worth the price.