In 698 didn't Sasuke said to Naruto that he's the only one that he accepts/treasures and he can't accept anyone else not to mention when he said he's his only friend and the only one who understands him not loving Sakura etc ? Then why the sudden change in this last chapters ? In 699 he did complete 180 and went OOC immediately by being all remorseful and muchy that's not him at all especially with Sakura also didn't he said in 631 that he knew what he did but he didn't care what people think of him ? Not to mention the whole chapter was from his POV like he's the hero of this story when it should be about Naruto how he changed everyone accomplished peace and achieved everything that he wished for again makes no sens . Sakura also from not trusting him , being angry at him went 180 forgiving him everything immediately and turning to the P1 crying fangirl with zero self respect and brushing of Naruto like he wasn't there at all No NS interaction at all .
The more I think of it the more this scenario makes no sens and looks like RTN scenario were all the character become complete opposites of who they have grown to be/are more so with chap 700 , they are pared with people that are complete opposites of themselves and all their dreams and desires are also the opposite of what they wanted , its not what they were setting themselves to be housewifes , dead beat fathers , all in relationships that they didn't want . Its like 699/700 the whole manga and characters went complete reverse what it was and who they were and it obvious that this two chapters are connected 699 lead to the epilogue that was 700 . I think I get it now were this RTN theory comes from and if its what we all think but question is were do you go from here and how do you fix this mess that's 699/700 from who's POV are we watching this or maybe all the characters lives have mixed into this one big giant of an IT mess ? Just giving my two cents hope this helps in some way .