The Second Generation

Soske Aizen created an army of arrancar with an elite group of espada numbered one to ten. This group of ten faced battle with Ichigo Kurosaki and the 13 court guard squads. While Aizen's plan was to invade the soul society and kill thousands of innocent souls, he secretly worked with the mysterious hogiuku to create a backup plan. His arrancar army perished and he was thrown to jail in the soul society. While he remains prisoner, his backup plan starts to take action. What is this backup plan of his and what's going up happen? Well, you're going to have to read and find out~