Board Thread:Naruto Discussions/@comment-3568954-20140709105551/@comment-3568954-20140710015314

GZulu wrote: Theory based on a few panels. This is more akin to speculation from scenes that have not been expanded upon. I can not see how one can make a workable theory from this.

It is logic. the castle has been shown in multiple dimensions kaguya created and then the newest one states they are in the core dimension and that Naruto could find sasuke from said core dimension so its a logical assumption that the castle is the key to her dimension hopping