I got the impression from the news that they simply wanted a sub-name for the current Castle line; the current series has been termed "Fantasy Era" by fans, yet the only official name I've seen is "Castle" (so is it officially "Lego Castle: Castle"??). While I don't think anybody has a problem distinguishing it from classic Lego Castle, or any of the sub-themes that could be identified by their factions (Fright Knights, Forestmen, Crusaders, etc.) it would make sense for it to have a proper official sub-theme name.
BTW, hi, I'm new on here.
