A lot of new members seem to be playing WoW. Create an official Zelaron WoW guild on a new server where people would likely join a guild with an already existing member-base. I'm not going to quit playing on Burning Legion with Volls and all, but all the newer members in the game could go to the Zelaron guild on a new server and that would help attract members.

Of course, this doesn't have to be WoW. This idea could apply to pretty much any game.