What if.. You were consumed by darkness but went to the organization instead and stayed their PERMANENTLY
The coconut trees were leaning due to the wind blowing so rapidly, destiny island looked like it was space but without stars, planets, asteroids, and the sun.
You helped Kairi get in the Secret Place safely then went outside to see where was Riku, after all you were the oldest out of Riku, Sora, and Kairi.
As exited the Secret Place to find Riku you seemed to get stuck in the sand, at least that what you thought. You tried moving your legs to help you get out of the "sand" but no avail came.
You soon looked down and saw darkness consuming you (The corridor of darkness specifically) and it looks like it wasn't gonna stop.
Once you were consumed by the corridor of darkness, you seemed to have pass out for no reason maybe it was the power of the darkness was overwhelming you.
Time skip
You seemed to wake up, actually it seemed safe and you were warm at least. The walls seemed polished very polished and white, it was very clean and empty..
You got up and managed to find a door that lead itself out of the room you were currently in, you walked out of the room and the whole place you were in was huge like castle but more empty.
You explored around, after some time of exploring around you seemed to run into a male that had a hooded like trench coat made out a leather, cold calculating orange eyes, tan skin, and silver hair (This was Xemnas)
Xemnas:"I see you're awake."