I think the interesting part is the obvious (or not too obvious) fact that Kishi has been leaving loose strings in the manga to come back an answer years and years later, or has already known about some of the stuff happening now five years ago.

Of course there's the open ended type twists such as Itachi + Madera killing everyone except Itachi just killing everyone, and the types of twists that just seem to have been there all along (or at least 50 chapters or so) like Madera possibly being in Akatsuki or Yondaime being Naruto's dad. Yes, we all suspected this by like the 2nd chapter, but it's still awesome to find out all this additional info as well, such as Naruto being named after Jiraiya's book and prophecies and what not.

Though it's annoying frustrating, and amusing that Kishi might introduce something and ignore it for oh, 50, 100 chapters, it's amazing when you see something from so long ago mentioned, like Zabuza/Haku. (Practically got a nosebleed from this)