Guild Wars Eye of the North

Campaign Four (a.k.a. Chapter Four) is an upcoming stand-alone product ("Campaign") of the Guild Wars game series, a follow-up of Guild Wars Nightfall (Campaign Three).

No title has been announced so far.

Content
Nothing is known about a theme or new content so far.

Release Date
No release date has been officially announced.

Only dates that are officially announced by ArenaNet will be posted here!

However, for personal estimation of the release date, the following facts may be provide some starting points:
 * ArenaNet have stated that they plan to release two campaigns per year, released on staggered six month cycles. Factions (campaign 2) was released April 28, 2006 and Nightfall (campaign 3) has an announced release date of October 27th, 2006.
 * According to Jeff Strain the development time for each campaign is roughly 1 year (source).

From official sites

 * none so far

From other sites

 * GameSpy Guild Wars -- development is underway