Aaron Ishikawa

Does make you wonder though why Square wouldn't save the news of a Final Fantasy VII Remake for their conference and let Sony announce it at theirs.

Incorrect. Sora definitely as met Aqua, she even told him to be there for Riku if he ever lost his way. He has also met Terra before DDD, just unknown at the time that the person he was interacting with was Terra. Remember, the Lingering Will (Terra) fight is a canon part of the Kingdom Hearts story, much like the Xemnas fight from Kingdom Hearts I

Keep in mind that the three had just woken up from a years sleep, and Namine probably forgot to put Donald's and Goofy's memory about visiting the tower long ago. That's how I interpret why Donald is surprised even though he had been there before. Also, who cares who banished Pete, the point is that he was banished and that led him to join Maleficent.

Sora is in fact a GOL, because of what Xehanort said in DDD. "Sora and another on your list belong to me now." Xehanort implied that Sora is one of the GOL's by the use of the word another, saying that Sora too is on the list of guardians of light.

At least Braig had the sniper rifle in Dream Drop Distance... right?

If I remember correctly, Mickey never saw Terra during BBS. Terra saw Mickey as he took the star shard and traveled off to try and save the worlds from the unversed.

Xemnas actually states that those without hearts search for another in order to feel complete. Well, Roxas didn't grow his own heart since Ventus' heart was already inside him, allowing him to not only wield a keyblade, but also take the appearance of Ventus as it was stated in the Kingdom Hearts series that the heart shapes the vessel. Kingdom Hearts Dream Drop Distance was a fabulous game that. in my opinion, answered a lot of questions in the Kingdom Hearts series while formulating new questions that makes fans want to buy the next title so their questions can finally be answered.