User blog comment:Godisme/The Closing Chapter Part 1/@comment-4903773-20120531195746

So from what I've been seeing lately it looks like Kubo wants to turn this Arc into a "Down Fall And Destruction Of A Great Society By The Hands Of An Old Enemy Who They Thought To Be Dead And Taking Over Their World, And The Escape Of The Few Who Survived" type thing.

And than probably a "Return Several Months Or Years Later And Triumph Over The Enemy Who Defeated Us By Doing The Same To Them As They Did To Us" type thing.

So basically the Shinigami defeated the Quincey years ago but than they come back and the Soul Society loses to the Quincey but they come and beat the Quincey and it keeps going and going. It could keep circling in loops if they're not careful.