Well, Naruto could be in awe of Beerus' power. Maybe he tries to learn some of Beerus' combat techniques. Since Naruto is known for his determination, he might pester Beerus to train him.
Naruto might initially be a bit intimidated by Beerus. But being Naruto, he would soon start to show his friendly side. He could offer Beerus some of his favorite ramen, which might be a strange but interesting encounter for Beerus. And in terms of power, Naruto could hope to combine his own chakra abilities with Beerus' godly ki in some way.
Beerus would likely be more powerful. He is a god of destruction in his own universe with incredible cosmic powers. Naruto is extremely powerful in his world, but his power is mostly based on chakra and ninjutsu, which is on a much smaller scale compared to Beerus' ability to destroy planets with a flick of his finger.
In this fanfiction, perhaps Naruto's training takes a new turn. Since he is the son of Beerus, he might have access to different types of training methods. His friends in Konoha could be both amazed and a bit worried about his new powers. Naruto could also use his Beerus - related powers to protect Konoha from threats that are beyond the normal scope of the Naruto world, like an invasion from a powerful interdimensional foe. And there could be a lot of drama as Naruto tries to balance his normal ninja life with his new - found divine heritage.
Well, Naruto would probably become extremely powerful. Beerus is a very strong character in his own universe. His training methods might be really intense and different from what Naruto is used to in the ninja world. Naruto might learn some new and strange techniques that combine his chakra powers with Beerus' godly abilities.
Well, a plot could involve Beerus accidentally getting trapped in the Naruto world. Naruto, sensing his immense power, initially thinks he's an enemy. But as they interact, Beerus discovers the concept of ninjutsu and Naruto learns about Beerus' god - like abilities. They could team up to fight a common enemy, like a powerful new Akatsuki member who has a jutsu that can disrupt the balance of the universe, which Beerus can't allow.
A different take on a Naruto - Beerus fanfiction could be a story where Beerus decides to train Naruto. Beerus is an extremely powerful being, and his training methods would be very different from what Naruto is used to in the Hidden Leaf. This training could unlock new levels of power for Naruto, and also lead to some humorous moments as Naruto tries to adapt to Beerus' strange ways.
He might use it to quickly defeat his enemies. For example, he could use Beerus - like energy blasts to take out multiple opponents at once.
It could be someone who wants to disrupt the relationship between Naruto and Beerus. Maybe a powerful dark ninja who sees Naruto's newfound connection with Beerus as a threat to his own plans for power.
Sasuke can also be quite popular in Naruto - Beerus fanfiction. His rivalry with Naruto and his own quest for power can be interestingly intertwined with the arrival of Beerus. In some fanfictions, Sasuke might see Beerus as a new challenge or an opportunity to gain more power.
The training could disrupt the power balance in the Naruto universe. Naruto would become much stronger than most of his opponents. It might also introduce new concepts like ki into the Naruto world, which could change how battles are fought.
If Naruto gains the power of Beerus in fanfiction, he would become extremely powerful. His already impressive combat skills combined with Beerus' god - like power would make him nearly unbeatable. He could easily defeat the toughest of foes in the Naruto universe with a single blow.