I bet im not the onlyone who thinks that naruto and friends still haave a lot to show in boruto, i have a idea to what a powerup for naruto could look like. Remember about kuramas flashback when he and naruto met the other bijuus? Remember what hagoromo said to them? "Even though you have been separated, you shall always be together. Until eventually that time shall come when you will become one… You each carry a name… And with a different shape than you had up to now, you will be shown a righteous path, different from the time you spent inside of me. What is true power… …Until that time…". I think it means that naruto the one will fuse the bijuus together into a new juubi. Here is how it could happen: in the future there is a very powerfull enemy and no one stands a chance against him/her but for some reason he/she retreats for a while. Hamura(hagoromos brother who acording to him has a part of the juubi sealed in him) appears to help naruto. Naruto already has or will have the entiry bijuus inside of him not just a little of their chakra (but they are still separate beings). Hamura gives naruto the remaining juubi and tells him to fuse the bijuus because its the only way. Naruto refuses because the bijuus would disapear but gets convinced from them(bijuus) that its the only way. He agrees and after a heartbreaking farewell fuses them into a new juubi. Lets name it perfect or true juubi it will also look diferent and will be alot stronger. Maybe as bonus the juubi tells naruto that the conscioucnesses feelings and memorys of the nine bijuus merged into one meaning they are not completly gone. What do you think good idea or bad, Maybe you have ideaa for a awsome design? I didnt like the look of the juubi
two things wrong. hamura cant appear before Naruto, since Naruto isn't connected to him by any means (blood or chakra relations), and second, the bijuu wouldn't agree to being the juubi again, anyways. although, the probability of Naruto getting chakra powerup from them, again, is fairly high.
The last thing Naruto would need at this point is more chakra. He already has parts of their chakra and can use their abilities, so beside his chakra increasing yet again, he would have no real benefit from becoming the TTJ. Also, at this point in order to surly kill Naruto you either need to have a ridiculous amount of power, something like Sasuke's TB Susanoo, or to extract his tailed beast chakra, or to have a strong enough sealing jutsu, things that more or less would be required to also defeat a TTJ, so it would be kind of pointless for him to become a TTJ. Sure, it would be a huge power-up, but not really needed nor would it be reasonable. I'm pretty sure that nobody from the old generation, Naruto, Sasuke, Sakura ETC won't get new powers or new power-ups. They will focus on the new generation and developing their powers. Boruto's eye and curse mark will need a lot of explaining and developing, same for Sarada and her sharingan and strength, same for Mitsuki and his SM, ETC. It would be ridiculous to focus on the old characters again. They had 700 chapters to do so.
NO.MORE.POWER.BOOSTS.PLS(sorry for caps).
Yeah, the two protagonists already reached their power limit while the supporting characters missed their power-up cues. Kishimoto had 700 chapters to gradually upgrade Kiba and all he did was give him the abilities to make a third Akamaru substitution in the end all the while Naruto was busting mountains and keeping a battalion of soldiers from dying with his chakra.
Fisrtly, Hamura has never been said to have any part of Juubi within him, neither by Hagoromo nor by anyone else. And secondly, Juubi cannot be reborn without Gedo Mazo being used as one of the components of its revival, while the Statue itself is currently sealed in Kaguya's core dimention, and there's no way to get it out from there (except, maybe, Sasuke summoning it with Rinnegan, but there's no reason for him to do so).