Wow interesting guild. xD
Ok, now here is my presumptions of the upcoming event. There is no proof to support any of this, they are just hypothesis based on what I have seen:
-Ian is not being treated for Vampirism, but instead is slowly transforming into a wherewolf/ cat creature. I say cat creature because he seems to be the only npc that can speak with Roofus, or atleast acknowledge his ability to speak (Except for us the members of Gaia. We are always granted exceptions). This wherewolf effect is probably a result of Gambino and his "treatments" he complains so thoroughly about in the manga.
-Von Helsons are vampires and the people in the background with glowing eyes are half-zombie half-vampire.
-Each Brooch when worn respectfully on the Halloween event will transform you into either a Vampire/zombie. Or a Wherewolf/Zombie. (I am ONLY saying zombie because Lanzer and the Admins want to incorporate zombies somehow. It probably will become more simple then that.)
-If Edmund is not a wherewolf, he is just a human. This implies you as a member of Gaia will be able to choose between a Wherewolf, a Vampire, or a Human membership during the event. A spectacular prize will be given for each side after completing some preliminary task, like defeating 100 wherewolves or something.
-Edmund is simply a hunter of vampires, otherwise they would have stated some sort of "reason" as to him being either a vampire or a wherewolf. (Although he DOES resemble more or less a wherewolf.)
Please do not post this for everyone to see. Instead re-write anything you feel should be shared to the public inspired by these writings. Thank you for reading my ideas for the event.