Actually, that's the end of the fic. I'll explain some of the theories applied in it:
"Neos/shells": I invented an offworld origin, just to spice things up, and also because of the reports concerning the light, dark, and in-between worlds.
Heartless: I also made the origin of the Heartless on my invented world of Primos, which might have been a little ambitious. Also, unlike in actual KH, the Heartless ARE hearts.
Sora's promises: I'm going on my theory that the BHK is responsible for making Sora remember his forgotten promises. Thus, he receives a paopu that Kairi bit off of. He uses that on the key he owns, being a key-wielder, and then attaches Oblivion to the "anti-key," thus he has Oathkeeper and Oblivion. I'll talk more about it later.
Ephram: This is a really cool name, and the best name I could think of for the BHK. In case you didn't catch it, in this fic, Ephram sacrificed himself, as Sora did in KH, but on a much grander scale. As in, his body is totally ruined. He's a key-wielder, and a powerful one at that, so Ansem's heart, DiZ, needs to replace his body. Enter Tidus. It was also a convenient way to wrap up the new Tidus
Tidus: I explained a little with Ephram, but I completely changed Tidus's character for the fic. I also tweaked everyone else's as well. I did this so I could have a dark key-wielder without finding a bizarre way to reincorporate Riku from the veritable grave, as far as I was concerned when I started writing. I also thought it would be cool for Tidus to suck some more and show off Jac's prowess with the Dream Sword. Oh, by the way. . .
Dream Sword: I'll be short with this. Merlin recovered the Dream Sword along the the Dream Rod and Dream Shield, which are available to Goofy and Donald in KH. The reason Sora can't get it, other than the fact that he HAS to wield the keyblade, is that Jac has it.
I'll read some responses and post answers to questions and stuff as well.