Board Thread:Boruto Discussions/@comment-28432164-20160514001744/@comment-25122992-20160514145626

@KazamiLight, you didn't have to guess, Naruto surely has his SPSM anyway. The SPSM manifestation is indicated just by crossed pupul with yellow irides and no pipmentation around the eyes (because it's a trait of the regular SM). And in Boruto Movie Naruto has exactly this kind of eyes when battling Momoshiki, so he used SPSM back then. Another question is that he still didn't bring out the TSBs and Tailed Beast powers, but there can be a lot of reasons for it, starting with the restriction of not using ninjutsu on Momo and ending with the plot reasons (it's just a movie, so all the battles within it must be quick and dynamic, no chance for a prolongued ones like in the anime, where the combatants surely can bring out all the abilities they have, albeit for 10+ episodes or so).

Edit: also, I don't think Naruto/Sasuke got much more weaker than during the Kaguya fight, even if they lost something after it - the former reunited Kurama halves within him, which surely boosted his current powers, plus I don't think he spent all this years without training and improving himself (even for two-three years between the FSWW and Toneri's threat, he was able to perfect his Rasenshuriken to the point he can throw and control it in thebase form); the latter surely improved his abilities during his vagabond travelling and on the secret missions, especially his mastery over Rinnegan (which was still incomplete during the final fight with Naruto, as Kurama commented, but has already risen to the point Sasuke can travel between dimensions) and the other significant techniques in his arsenal (since he had to learn how to handle all of them with only one hand).