Naruto might be ostracized by some in the ninja world. People could be afraid of his new power, especially if they don't understand it. They might see him as a threat, similar to how they once feared the Uchiha for their powerful Sharingan. So, he may have to deal with a lot of distrust from his comrades and the general public.
There could be physical consequences too. The Gedo Statue's power might be too much for his body to handle initially. He could experience pain, or even put his life at risk if he doesn't learn to control it properly. It's like when he first started using the Nine - Tails' chakra, he had to learn to manage it or else it would consume him.
He might gain the ability to control the tailed beasts more directly. Since the Gedo Statue has a connection to the tailed beasts, Naruto could potentially use this new power to better communicate with them or even draw on their strength more easily.
In some fanfictions, if Naruto absorbs Gedo Mazo, he might gain incredible power. This could potentially change the entire power dynamic in the Naruto universe. He could use the dark chakra within the Gedo Mazo in unexpected ways, perhaps even finding a way to purify it and use it for good.
One possible consequence could be an immediate power boost. Since Dark Naruto represents the repressed and negative aspects of Naruto, absorbing it might give Naruto access to a new level of strength that was previously locked away. This new power could be both physical and mental, allowing him to face stronger opponents.
Well, it really depends on how the author of the fanfiction writes it. One possibility is that Naruto's personality could be affected. Since the Gedo Mazo is associated with negative and powerful forces, Naruto might struggle with darker impulses. However, he could also use this new power to protect his friends and the village in ways he couldn't before. Maybe he could even find a way to purify the dark chakra he absorbed from the Gedo Mazo and turn it into a positive force for good in the fanfiction world.
In some fanfictions, when Naruto absorbs the bijuu, he might gain overwhelming power. This could lead to him being able to easily defeat powerful enemies that were previously a threat. For example, he could single - handedly take on the Akatsuki without much difficulty.
One potential risk is losing control. The Kyuubi's power is wild and Naruto might find it difficult to keep his sanity while using it.
One consequence could be an increase in Naruto's power. Since Dark Naruto represents his repressed negative emotions and power, absorbing it might give him a boost in strength and abilities. He could gain new jutsu or have enhanced versions of his existing ones.
The overall theme of the fanfiction could change. If Naruto absorbs Orochimaru, the story could start to explore themes like the nature of power and corruption more deeply. It might also delve into how Naruto can use Orochimaru's power for good, rather than succumbing to the evil associated with it. This could make the fanfiction more of a moral exploration within the Naruto universe.
One possible consequence is that he might become more powerful. With his dark emotions out of the way, he could focus better on his training and unlock new abilities. Another consequence could be that he becomes more isolated. Since his dark emotions were a part of what made him relatable to others, without them, he might seem distant.
When Naruto absorbs Zetsu in the fanfiction, it could impact his mental state as well. Zetsu has been involved in many dark and devious plans. Naruto might have to struggle with the knowledge and influence of those. However, on the positive side, Naruto could use Zetsu's ability to communicate with the plants and gather intelligence from the natural world. This would expand his range of information sources and give him an edge in strategic planning during battles.