I've seen it stated a few times around here - without knowing for certain that the people making the statements are in fact correct - that Areanet has as part of its contract that governs NCSoft's acquisition of them that, should NCSoft wish to terminate its ownership of Areanet, Areanet has the right to buy itself - and all relevant IP - back from NCSoft.
I believe NCSoft *is* trying to remove its entire presence in North America, and centralize in Korea. I'm not sure what will happen to Guild Wars 2, but it's likely if you're a player of any of their games from the U.S., you'll have to look forward to almost no support (the support crew would be centralized in Korea too), servers located in Korea - creating connection problems for players of games like Aion and GW2, as well as weird maintenance windows - and slow future development, since Korean language versions would be released first.
The only positive to GW2 is it's relatively independent, and they can search for a new publisher, or go independent, if they don't like the new terms (very likely that all servers and support will be relocated to Korea). If they can't agree, though, we may see them disappear as well.