Well answer me this were Morrowind and Oblivions rights claimed befor they were made? At what periods of times were the rights claimed so i can try peicing things together.
I'm not sure about Morrowind but Oblivion was reserved some time before release i think, though as mentioned it could just as well be a PR stunt as people now assume it would always be like that.
BTW some people speculated "then it's possible someone else registers the province names first", might be possible but, as Oblivion and even Daggerfall showed, they don't necessarily name them after the province it's set in (Just for Info, daggerfall is a town not a province). You could even say that for Morrowind as technicall they game was set in "Vvradenfell" which is just a region of Morrowind.
So all cards are still open.