Serious question, because I totally forgot.
Well, I know that Ichigo is fighting to save Orihime from Hueco Mundo. That much is obvious. Although part of me is like "Hey Ishida has Orhimie and they should totally get out to safety while Ichigo fights just so they can all retreat since MISSION ACCOMPLISHED."
But what is everyone else doing again? Aizen is in Kakura town, why exactly?