Final Mix: Secret Episode

In BBSFM, there's a whole new episode, and I haven't seen anyone say anything about it's contents, only talking about the fact that it exists and woe is the US for not getting it.

For those of you who don't know, the "Secret Episode" has you playing as Aqua in the Realm of Darkness. You have no access to the world map, the only keyblade you are able to equip is the Master Keeper (Master Eraqus's keyblade), and all the enemies are pureblood heartless (shadows, neoshadows, darkballs, etc). The episode ends with Aqua encountering an unnamed new type of heartless that the fandom has taken to calling "Red Eye." After watching a video of the fight, the reasons become obvious. There is also a new secret ending called "Zero Point," which shows Aqua finding the Castle of Dreams after it was swallowed by darkness (which we know happened sometime before KH1), and ends with the words "Birth by Sleep Volume 2." Is this a new game that's going to be released?

Anyways, that's about all there is to it. As usual for the series, more questions are raised than answered.