We'd need to expand beyond the realms of this website's interests (ie. World of Warcraft, Warhammer, Eve, City of Heroes/Villians, etc)
I think next year might be a bit...hard to accomplish, cause just getting a hotel/convention center/expo center/whatever in time to have a con might be a year, and you'd have to have money upfront to reserve which doesn't seem like a wise idea to do if you don't have people lined up for it.
Also I suggest summer as lets face it large part of the mmo demographic is teen and teens have school in fall.
I think this would be more feasible for summer 2010. imo.