So, if the Rebirth theory is correct, I just realized that this update gave some people their wish about getting to see Terra and Aqua really fight each other. LOL.
(Because I know some people seemed annoyed that in BbS--despite hints otherwise, and all the build up--we never really saw Terra and Aqua get into a brawl. The only time they did get into a fight to the death was because Xehanort was possessing Terra, and not because it was Terra himself... Unless you count their Mark of Mastery exam, I guess. Or when Ven has a flashback of them training/battling each other in the Olympus Coliseum, but those were just cutscenes that you didn't get to play. And once again, they weren't really at odds with each other there: just being instructed to face off against each other by Master Eraqus.)
@Ballad of Caius: So you're basically saying that the Master of Masters in some sort of Naminé in Chain of Memories situation?
@makine: And don't forget Sora, Donald, and Goofy, and Sora, Riku Replica, and Naminé in the fake memories from CoM
(But in all seriousness, that's a really good theory that you have, and I think you're right about Ephemera, Skuld, and Player being the new trio.)
I also think I'm starting to ship Ephemera with Ava, and Player and Skuld together (I kid). Mostly... Skuld being the first person to get Player to talk does somewhat get my shipper heart going, though. LOL. Somewhat.