Board Thread:Boruto Discussions/@comment-28432164-20160514001744/@comment-26127155-20160514013819

Naruto and Sasuke seemed to have peeked around the age of 17, and the Kawaki and Boruto we see in the manga look like they could be in their twenties. They have already mentioned that Naruto's abilities are rusty since he rarely involves himself in combat, and Sasuke is rarely ever in the village so it would not surprise me if he is away during this destruction of Konoha period.

Kawaki could have had help from other characters as well, leading a revolution against all of ninja kind, or started a civil war which would have destroyed the village from the inside.

Kawaki and Boruto also look to have received multiple power boosts by that time period, so they could also receive SO6P chakra to put them on par or become even stronger than Naruto and Sasuke. We have to give this writer a thumbs up for stating that none of our favourite characters will be safe in this manga, something that we barely felt during the whole original Naruto manga run. Now we just gotta hope they make a possible Naruto death as bad-ass as possible.

Edit: Also since we have already introduced the idea of aliens in this series, we could see multiple other races come in and one may get the better of Naruto, even before this clash between Kawaki and Boruto. They do refer to Naruto as the "7th" which could imply an 8th has already been appointed.