Sora's future yet to come. It started not long after the events of Kh2, Sora was in a battle with his counterpart Roxas (this is a paralell dimension where roxas and sora both lived) but Roxas was able to overwhelm Sora with darkness. Darkness quickly spread through Sora's heart, overtaking him. Lost and confused from the darkness he was quickly taken in by Organization 13 as their "Secret Weapon". Sora now dual wields the Dream sword and the Kingdom Key.