Board Thread:Theories and Speculation/@comment-32832770-20170901112604/@comment-734582-20170901170650

Vladosaurus wrote: We also don't know anything about his abilities, nor do we know if Naruto is actually dead. Plus, the Kote means that Kawaki could've stolen some big ass ninjutsu and used it on Naruto to defeat him, even if Kawaki himself does not have that power.

Quite frankly, all options are open. But personally, i'm suspicious of Kawaki's specific words and it may mean that Naruto has been banished to some other dimension.