Why talk about servers and name them NA, EU?
As I see it this DKO forum is the EN -version. So this proberly will be the EN server.
(Try look at the forum URL)
There are a German version too, and maybe more. You might say the German is EU, but many europe players dont speek german and play the EN version of Aria-games.
So what you call NA is what Aria normaly name EN?
And EU is DE?
I dont think this game will be different. Just like the others, it will have different portals for EN, DE etc. And this one is EN.
Link to the German version: http://de.dkonline.aeriagames.com