Naruto's use of the force would make his battle style more strategic. Instead of relying solely on his chakra - based jutsu, he could use the force to perform long - range attacks. He could pull or push his opponents from a distance, similar to some of his wind - style jutsu but with a different kind of energy. This would give him an edge in battles, especially against opponents who are strong in close - combat but not so good at dealing with ranged attacks.
Naruto's use of haki would be a game - changer for his combat skills. Haki has different forms. For example, the Observation Haki could allow Naruto to see the future movements of his opponents to some extent. This would combine really well with his already amazing combat skills like his Rasengan and Shadow Clone jutsu. He could use his clones more effectively to surround and attack his enemies while using haki to predict their counter - attacks.
In fan - made stories, Naruto's multiverse powers often serve as a plot device to explore different 'what - if' scenarios. He could use these powers to team up with alternate versions of himself. For instance, a more evil Naruto from another universe might have unique skills that our Naruto could learn. To access these powers, he may need to enter a special mental state, like a deeper form of Sage Mode, which allows him to tap into the multiverse energy.
In some fanfictions, Naruto might learn to use Hiraishin through special training with a knowledgeable mentor, perhaps someone who was close to the Fourth Hokage who originally developed the technique.
His relationships with some characters might change. For example, Sasuke, who is highly skilled in ninjutsu, might view Naruto differently. Naruto would have to prove himself in new ways. He could become more of an underdog in the eyes of the village. His training would be completely different. Instead of learning jutsus, he would be focusing on things like physical conditioning and mastering different types of ninja tools.
Sasuke could still be a tough opponent. Even though Naruto can use all elements, Sasuke has his own powerful abilities, like his Sharingan and Rinnegan. He's very skilled in ninjutsu and genjutsu. Another tough opponent might be Madara. He has vast experience and extremely powerful jutsu. Naruto would have an advantage with all elements, but Madara's knowledge and power would make him a formidable foe.
In some fanfictions, Naruto might be able to use Ki by undergoing special training. Maybe he meets a mentor who teaches him the ways of Ki manipulation. This mentor could be from a different realm or have a unique connection to Naruto's own chakra system, and through intense practice and spiritual growth, Naruto gradually masters the use of Ki.
Some fanfictions might play with the idea of alternate universes. In an alternate universe, the rules of ninjutsu are different. Naruto could be born with a combination of Uzumaki and Uchiha bloodlines, which would make it possible for him to use Susanoo. Or perhaps he is given this power by a powerful entity in the fanfiction for the purpose of fighting a greater evil that no one else can defeat.
Mostly, yes. Fanfiction writers love to play with the idea of Naruto's Rasengan. They might give it new forms, like a lightning - infused Rasengan or a Rasengan that can split into multiple smaller ones. Since the Rasengan is so central to Naruto's character in the original story, it often makes an appearance in fanfiction, but of course, there are always exceptions depending on the unique ideas of each writer.
In some fanfictions, Naruto might be able to use Mokuton through some special plot devices. For example, he could have received some special training from a hidden master who has the knowledge of Mokuton. Another possibility is that he might have some sort of bloodline connection that was previously unknown, which enables him to use this powerful wood - style jutsu.