My Sweden by 1492. Russia formed recently and Poland inherited Lithuania shortly after that. After I've annexed Denmark-Norway and sold Iceland to someone, even for no ducats, I'm going to take control of Danzig. After that I foresee a Livonian War repeating itself. Russia seems to be aiming to invade me anytime, it's amassing troops at the border so I'll try to ally with Poland to stave them off while I stabilise myself.
Själland is a stain on the map, but it will soon be Swedish.