Okay, so we're down to two plots. The second one I posted before, and a new one I've made. They're pretty similar, but see which one you like best. I changed the second one a little, so be sure to read carefully. Don't forget to vote!
1. Byakuya and Kenpachi have killed Yammy, and together with Mayuri, they gather a group of shinigami and arrive just in time to help Ichigo fight Aizen. When the Shinigami arrive though, Ichigo tells them to stay back; he'll fight Aizen himself, or die trying. After a long, bloody battle, Aizen dies while fighting Ichigo. The shinigami kill Gin, and they shinigami think their problems are done. But back in Hueco Mundo, there's a new leader. And they're ready to kill.
2. It's been almost a year since Kurosaki Ichigo defeated Aizen Sasuke and Ichimaru Gin. The shinigami killed the remaining Espada, and things in the Soul Society have been peaceful. Back in Hueco Mundo, a new group of Espada has formed. Their goal? Avenge Aizen's death and destroy the Soul Society. The Arrancar fight over who will lead them, but finally they select a mysterious new leader, the Espada and Arrancar plan to arrive in both the Soul Society and Karakura town on the anniversary of Aizen's death, knowing the shinigami will have to split up. With many new and powerful Arrancar, Hueco Mundo has a chance of out numbering and defeating the Shinigami.