The Dragon is the forefather of all Demonslayers and he is at the center of all of the Guardians Faith. The Ancestral Dragon, who single handedly subjugated the demons, is the God the the Guardians.
The Guardians command the Four Corps which consist of the Forest, Wind, Mountain and Fire corps. Each corps have their own responsibilities and they are all scattered throughout Nuanor.
The Great Wyrm is the highest office of the Guardians and commands the Four Dragons along with their respective Corps. There are supposedly two Grand Wyrms - Yin and Thunder.
As Revelation Online's CBT3 ended, the official team revealed that they were planning the next steps for the project and a new timeline might come sometime within the next week.