Board Thread:Theories and Speculation/@comment-1512913-20161105081557/@comment-4912646-20161202034313

The entire last third of Naruto (beginning around Jiraiya's battle with Pain) is just full of unexplained and one-off concepts that weren't given any focus. Just look at all the terms and such that were introduced in that time but never properly explained: Yin and Yang, Sensor Type, Nintaijutsu, Blaze Release, Kekkei Tōta, Sage Transformation, Six Paths Senjutsu, Kekkei Mōra, Rinnesharingan, and the list goes on. Even the Rinnegan, for being such an important plot device later on, never got a proper introduction to its abilities like the Sharingan and Byakugan did. Adding on all this backstory about aliens at the end certainly didn't help, but at least the Boruto series still has a good chance to delve into that.