The Juubi itself, if it had some form of sentience in the fanfiction, would be a huge factor. It might view the Justice League as insignificant insects at first. But as the League shows their strength and unity, the Juubi might start to respect them. Characters like Wonder Woman would not be intimidated by the Juubi and would stand up to it, trying to communicate with it to find a peaceful solution. This would create a very interesting dynamic between the Naruto characters, the Juubi, and the Justice League.
Well, Naruto himself would be very curious about the Justice League. He would probably be excited to meet heroes with such different powers. He might try to show off his own skills a bit at first. As for the League, Superman would likely be intrigued by Naruto's chakra - based powers. He would want to understand how they work compared to his own superpowers.
They could interact in various ways. For instance, Naruto might be in awe of the Justice League's high - tech gadgets and superpowers at first. The archangel could start by explaining to Naruto how the Justice League operates. Then, characters like Batman might be interested in Naruto's stealth and detective - like skills, which are similar to his own in a way. The archangel could also use its powers to help the team communicate, since they come from different universes with different languages.
Naruto could be like a new and unique member. His ability to use ninjutsu would be a fresh addition. And the Juubi could be a power source or a danger they have to deal with. Maybe Naruto uses his skills to help the Justice League understand the Juubi better.
The Juubi could be the main villain or a major threat that brings Naruto and the Justice League together. Its massive power would be a huge concern for both parties.
The characters would have very interesting interactions. Naruto might be in awe of the Justice League's powers at first. The Flash's super speed could amaze him. And the Justice League members would be curious about Naruto's ninjutsu. As for the Ten - Tailed Dragon, it would be a common enemy that forces them to work together. Batman might study Naruto's fighting style to come up with a plan to take on the dragon.
Naruto could fit in as a powerful ally. His ability to use chakra and his combat skills would be valuable. He could use his shadow clones to gather information or distract enemies. Against foes related to the Juubi, his experience in fighting powerful demons in his own world would come in handy.
Naruto's chakra - based powers like the Rasengan could be combined with Diana's superhuman strength. For example, Naruto could create a Rasengan and Diana could use her strength to throw it at an enemy with even more force.
Batman would likely be very cautious around the Avengers at first. He'd be observing their tactics and technology. Thor, on the other hand, might be curious about the Justice League's powers, especially Superman's strength. He might challenge Superman to a friendly test of strength.
In fanfiction, they might interact due to a misunderstanding at first. Maybe the Justice League sees Ben using his alien powers and thinks he's a threat. But then they learn that there are other forces at work that are endangering both their worlds. So they start to communicate and plan together. Ben can show the League his knowledge of different alien races and technologies, while the League can share their experience in dealing with big - scale threats on Earth.
A Rinnegan - having character could team up with Batman. Batman would be intrigued by the new powers and would want to study them. Together, they could come up with strategies that combine the high - tech gadgets of Batman and the otherworldly abilities of the Rinnegan. The character could use the Rinnegan's ability to absorb and release energy to power up some of Batman's devices in a pinch.
The characters from these different universes would have very diverse interactions. For example, Harry Potter characters are used to magic, but the superpowers of the Justice League would be something new and astonishing to them. Meanwhile, the horror elements of Silent Hill would be a shock to both the magical and super - powered groups. Superman might try to protect the students of Hogwarts from the Silent Hill monsters, while Hermione would be fascinated by the technology of the Justice League's gadgets and try to learn from them.