Meteor falls down on Gaia and harms the planet enough to force the planet to concentrate at the wounds. The planet is forced to take away all life to actually recover and drains the life energy out of their bodies. Sephiroth becomes more powerful for the final battle as he receives the power. Cloud and the others wake up in the Lifestream and the Dungeon is the flow of all life, that is a part of Sephiroth now. In its core the core of Sephiroth can be found and the final battle begins. When Sephiroth is weakened, he loses control over Holy and Holy starts to protect more and more soul inside of the Lifestream. Aerith joins for one last battle and in the end joins the Lifestream again while she guides the souls to their bodies back which were not supposed to die yet and the Lifestream starts to heal the Planet for real.

Then the sequel as it always was.