Summary
Naruto Uzumaki is one of the most important characters in the entirety of theNarutofranchise, which also includesBoruto. Even though the sequel story is not about him primarily, Naruto remains to be an exceptionally important part of it.
Naruto Uzumaki is currently sealed away in the dimension of Daikokuten, however, at some point in the future, he is going to return. When Naruto does return, there is a decent chance that he will be given opportunities to show off his strength once again and, when the time does come, fans would love to see him utilize new powers. There are quite a few that Naruto can acquire and others that are already up his sleeve but he hasn’t utilized.

Improved Sage Mode
Naruto is a perfect sage.Fans know him to possess an incredible mastery of Sage Mode, such that he can access this form in a matter of seconds as an adult. Naruto had already mastered this technique when he was a teen, shortly before the Pain’s Assault arc. However, his skill did not stagnate.
Naruto has continued to train this art for years after learning it and, by his own admission, his Sage Mode capabilities as an adult are much better. After he returns, Naruto surely has to train this art even more and take it to the next level. This is because he does not have access to Kurama anymore and he will have to make up for that in some way. Sharpening his skills as a Sage Mode user would be a start for sure.

Boil Release Chakra Mode
Boil Release is an exceptionally powerful Kekkei Genkai that is very rare in the world ofNarutoandBoruto. This power was granted to Naruto Uzumaki through the chakra of the Five Tails, Kokuo.Fans know that Naruto lost Kurama, however, he should still have access to the chakra of the other Tailed Beasts. If he does not have access to their chakra right now, Naruto can very well seek them out since they are very much alive, and gain access to their powers.
Given that he has a bond with them, these beasts would be willing to provide him with their powers. Most likely, Naruto already has this power up his sleeve at the moment and he has already tapped into it once during the fight against Kaguya. Boil Release Chakra Mode will allow him to boost his powers dramatically and give boiling properties to his chakra. This allows him to increase his physical attributes by a great margin and fight back against even stronger enemies. This power would surely come in handy when Naruto is unsealed inBoruto.

Lava Release Chakra Mode
Another power that Naruto Uzumaki could end up gaining inBorutoafter he is unsealed is the Lava Release Chakra Mode. This power was seen being utilized by Roshi, the Jinchuriki of the Four Tails. Naruto Uzumaki has access to the chakra of the Four Tails and he did make a bond with him. Given that he is ableto infuse Lava Release into his Rasenshuriken, Naruto, with a bit of training, can also tap into the power of Lava Release Chakra Mode.
This power is incredibly dangerous and it gives corrosive properties to the user. Naruto can power up all his jutsu with these incredibly dangerous powers and, at the same time, he also becomes untouchable himself. This is a power very difficult to counter, especially if a skilled user such as Naruto Uzumaki utilizes it.

Wood Release
Wood Release isone of the strongest Kekkei Genkaito exist in theNarutoworld. This jutsu has been utilized by only a handful and its very best user was none other than Hashirama, the first Hokage. Ever since then, other users of this Jutsu have also popped up over the years, however, very few have managed to hit the same levels, such as Madara. Naruto Uzumaki has mastery over all five natures.
More importantly, he has a prosthetic arm made from Hashirama’s cells, which should give him access to Wood Release. Perhaps, Naruto did not feel the need to rely on this power since he had Kurama at his side, however, now that he has lost his biggest asset, Naruto has to make do with what he has and Wood Release might just be one of his very best powers. After Naruto Uzumaki is unsealed inBoruto, fans can potentially see him make use of this power.

Scientific Weaponry
There are quite a lot of powerful Scientific Ninja Tools that are being developed by the day in theBorutoworld. Fans have already seen quite a few of them, such as the Chakra Saber, and the Chakra Absorption Tool that Naruto Uzumaki himself tested out. These tools can very well be utilized by Naruto himself. Now that he does not have access to Kurama, Naruto does need a way to keep up with the strongest and ensure that he can defend his village againstthe likes of the Otsutsuki.
Over the course of the last 3 years, there are bound to be major advancements in the field of science. If some powerful tools that far surpass the capabilities of the Chakra Absorption Tools have emerged, fans can rest assured that Naruto Uzumaki would be interested in trying them out. In doing so, he would gain a major power-up and get much stronger.