Hey, guys!
I'm not really aware of any theories regarding what happens to aqua in kh3, so please forgive me if what I say here has already been said before.
So, I was watching the trailers again and in the big hero one (
) around 3:14~ Aqua appears to be being beaten by that heartless that follows Ansem SoD, and later in that same trailer, Aqua is unconscious and about to be killed by Vanitas in the Land of Departure, which means that Castle oblivion was turned back to LoD by then. So, I wonder if dark aqua came from this? With "killing" being a strange word here... Maybe Vanitas adds darkness to her heart? This doesn't mean that Ven was taken by Xehanort, perhaps when they arrived there (Aqua and Vanitas), Ven had already left or Aqua manages to send him elsewhere.
What do you guys think?
Also, I don't know why, but there's this short video with so few views from the scene of aqua battling sora (this was taken from Square footage it seems).
Shame I can't understand anything that is said. If someone can, please post here.
So, regarding that video, we know that Riku will star the game by going to the RoD to find her. When we were first introduced to dark aqua, in the frozen trailer, we saw riku sitting in a strange pose. I believe he is either taken by surprise by dark aqua who attacks him and steals his keyblade and so Sora has to go to rescue him and free Aqua from the darkness...
Man, I really can't wait to see exactly how this unfolds