Already, it starts off with a master/prophet giving his apprentice a Keyblade that is later used by Xehanort, meaning that Keyblade is probably pretty important.

And Xehanort's Keyblade can see the future?

It seems like a lot of lore is going to be crammed into a now-defunct mobile game.

Part of me feels like the Master of Masters is going to turn out to be Demyx prior to becoming a Nobody. (I think the only Organization members whose human forms aren't accounted for are Marluxia, Larxene, Demyx, and the earth guy from Chain Of Memories)

Never mind, Lexaeus's human form was in Radiant Garden.

I just figure that, much like Demyx, the Master isn't very serious, and the Master and Luxu are wearing black cloaks that the Organization members wear, which also hide their identities completely. (So I'm guessing they're someone that the audience knows)

Though I think Luxord, the gambler, is also someone whose human identity is unknown.

The Keyblade War seemed to start because the Master of Masters' apprentices were paranoid, conniving, and/or jerks.

(at least, I assume this is meant to be building up to the Keyblade War)

It feels like these cutscenes take place in one of four places - the Master of Masters' office, the fountain plaza, a warehouse, or an alleyway.

The Master of Masters gave everyone a role that involved betraying, undermining, or contradicting the others (aside from Ira, though him being made the leader would cause other issues), told them to keep it a secret, and those secrets caused them all to turn against each other. Either he's not as good at seeing the future as believed or he's a jerk.

What was in the Box - Seven

That's mildly annoying - once it seemed like it was actually building up to something, it ended. No resolution on who the traitor was, no Keyblade War, nothing. (Though maybe the Keyblade War is like the Time War in Doctor Who, where it's so massive that nothing can do it justice)

We got lore about Xehanort's Keyblade; not sure if it will turn out that he's being manipulated by the Master of Masters or Luxu. (Since Luxu presumably gave Xehanort his Keyblade)