Board Thread:Naruto Discussions/@comment-945885-20140723175903/@comment-945885-20140802040252

They're probably just a collage of important words and phrases from the manga, though you could obviously trace a very clear trajectory if you follow from the top right to the bottom left.

I mean, frankly, I'd be surprised if the series didn't end with one last fight between Naruto and Sasuke in the Valley of the End, on friendly terms or otherwise. Kizuna (Bonds) has come to be the single most important theme of the series, and the relationship between Naruto and Sasuke is the most important example of that.