Here's your answer from an interview with Nomura:
So there you go. Clearly Nomura was planning on doing a game for this long ago, only now there's a third scenario:
Aqua's time in the Realm of Darkness.
There we have it. Three different scenarios for BBS V2. That would be the best way to sum up his past intentions.
And since this and 3D are the last games before KH3, this game will be Nomura's chance to wrap up everything he wants told.
And no, Days doesn't count for Riku's absence. He was barely in it. Plus, we still haven't seen what Riku did in the Realm of Darkness between Castle Oblivion and meeting DIZ.Presently there are 4 main untold stories to consider: "the period of the King's absence", "the period of Riku's absence"
So there you go. Clearly Nomura was planning on doing a game for this long ago, only now there's a third scenario:
Aqua's time in the Realm of Darkness.
There we have it. Three different scenarios for BBS V2. That would be the best way to sum up his past intentions.
And since this and 3D are the last games before KH3, this game will be Nomura's chance to wrap up everything he wants told.