One possibility could be that Naruto is drawn to boxing because of its physicality and the determination it requires. He might see it as a new way to test his strength and endurance outside of ninja battles. Maybe he starts training with a local boxing coach who sees his potential and helps him develop his skills.
Antman shrinks in comics thanks to the Pym Particles. These particles interact with his suit's technology to alter his size. It's a complex process but crucial to his superhero powers.
One possibility is that Naruto, with his determination, could adapt Zeref's powers in a unique way. Maybe he'd use Zeref - like magic to enhance his ninjutsu. For example, he could infuse Zeref's death - based magic into his Rasengan, creating a more powerful and dangerous attack. Another aspect could be Naruto's personality change. If he becomes influenced by Zeref, he might become more brooding and less of the cheerful ninja we know. However, his core values of friendship and protecting the village would still likely be there, just warped a bit by Zeref's dark nature.
One possibility could be that Naruto is transported to the Mortal Kombat universe and through some magical or technological means, he takes on the powers and identity of Sub - Zero. Maybe he has to adapt to the new combat styles and the brutal nature of the Mortal Kombat world while still retaining some of his Naruto - like traits such as his determination and never - give - up attitude.
In the 'Naruto Becomes Super with IQ 500' fanfiction, Naruto's newfound intelligence could lead to him making amazing scientific breakthroughs in the ninja world. He could understand the chakra system on a whole new level and develop new jutsus that are far more powerful and efficient. His IQ would also help him in diplomatic situations, allowing him to negotiate better treaties and alliances for the Hidden Leaf Village. This would change the power dynamics not only in his village but across the entire ninja world.
Perhaps there is a portal that opens up between the Naruto universe and the Transformer universe. Naruto gets sucked into the Transformer world and has to adapt quickly. He finds that his Ninja training gives him an edge in this new world. He teams up with some Autobots, and they are amazed by his ability to move stealthily and use his chakra in unique ways. Together, they fight against the Decepticons who are planning to invade the Ninja world.
In this fanfiction, Naruto becoming Asura could bring about a whole new level of power. It might change his relationships with his friends and foes alike. For example, his connection with Sasuke could take on a different dynamic as he becomes a more god - like figure. His abilities would likely be enhanced to an extreme degree, allowing him to face threats that were previously insurmountable.