I just stopped working for Games Workshop NE\'s Marketing department (which includes events) so I can clear this up a bit. Wojenny Mlot will not become Northern Europe\'s Games Day and Golden Demon - it will become Emerging Market\'s Games Day and Golden Demon.
Northern Europe used to include a lot of unusual territories (Poland, Russia, Greece, The Falklands, things like that) but they were recently split away so that they have their own department you see. Therefore they have decided to make Wojenny Mlot their official GD.
Northern Europe (Belgium, The Netherlands, Sweden, Finland, Norway, Iceland, Denmark, Eire and Ireland) still wants to do a GD too, but as the countries are so spread out the difficulty is deciding on a country to host it in. Imagine how much fun the GW Helsinki staff would have if they had to take their customers on a coach to the GD in Eire!