Well, he could team up with Superman. Imagine Ben using his alien forms to help Superman fight Lex Luthor's latest evil plan. His alien powers would add a whole new dimension to the battles in the DC Universe.
If Ben 10 were in the DC Universe in a fanfiction, it would be really interesting. Ben's Omnitrix gives him access to a wide variety of powers. He could interact with Batman and share his technology knowledge. Maybe Ben could even help Batman upgrade some of his gadgets. Also, his alien forms like Heatblast could be useful against some of the fire - based villains in the DC world. And his XLR8 form could provide super - speed assistance in chasing down bad guys, just like The Flash but with a different style.
In a fanfiction where Ben 10 is in the DC Universe, he might face some challenges. The DC Universe has its own set of rules and powerful characters. Ben would have to learn to adapt. For example, when dealing with magic - based threats like those from Circe. His alien forms might not be as effective against pure magic. But on the other hand, he could bring his own brand of heroism. He might inspire some of the younger heroes in the DC Universe like Robin to think outside the box when it comes to combat and using powers. His ability to transform into different aliens would make him a unique and valuable asset in the fight against evil in the DC world.
He would probably be seen as a very powerful and unique being. His chakra abilities could be mistaken for some kind of meta - human power. Maybe he'd team up with the Justice League to fight against powerful threats like Darkseid. His skills in combat and his ability to use shadow clones would give the League an edge in battles.
Well, Naruto's unique ninja skills would be quite a shock in the DC Universe. His ability to create shadow clones could be used in various ways, like for stealth or for overloading opponents. He might team up with Batman, as Naruto has a strong sense of justice and could learn a lot from Batman's detective skills. And his Rasengan could be a powerful weapon against DC villains.
If Goku were in the DC Universe in a fanfiction, it would be really interesting. He might form an alliance with Superman. They both have a strong sense of justice. But their fighting styles are quite different. Goku's martial arts skills combined with Superman's super - powers could make for an unbeatable team against the likes of Darkseid or other major threats.
Well, if Spider - Man were in the DC Universe in a fanfiction, he'd probably have some interesting team - ups. He could swing alongside Batman, sharing their skills in the dark and on the rooftops. Maybe he'd learn some new detective skills from Batman too.
They might have to adapt to the unique rules and powers in the DC Universe. For example, if it's a normal human from our world, they'd be shocked by the existence of superpowers like Superman's flight and strength. They could also get involved in the classic DC storylines, either as a helper or a disruptor.
His powers might be enhanced. In the DC Universe, there's a lot of energy and power sources. Maybe the Omnitrix could absorb some of that energy and give Ben new and stronger alien forms.
Well, in a fanfiction scenario of being reincarnated in the DC Universe with wishes, it really depends on the nature of the wishes. If a person wished to be a part of a particular superhero team, like the Justice League, right from the start, it would completely alter their story arc. They could use their wishes to have knowledge of future events in the DC Universe and prevent disasters or team up with their favorite heroes in unique ways.
In a fanfiction where Harry Potter is in the DC Universe, there are countless possibilities. He could introduce magic to the DC world on a large scale. Imagine him using the Patronus charm to protect Metropolis from Doomsday. His wand could be a unique weapon in a world full of superpowers. Also, his knowledge of the wizarding world could help in solving some of the DC Universe's mysteries, like ancient spells that could counteract certain super - powered threats.
If Harry Potter goes to the DC Universe in a fanfiction, it could be really interesting. His magical skills would be a new element in the DC world. He might be confused by the different powers and technologies there. For example, his invisibility cloak would be a different kind of 'invisibility' compared to the technology - based ones in DC. He could also learn a lot from the DC heroes about courage and justice, and in turn, teach them about the magic world.
Well, Saitama would probably be an overpowering force in the DC Universe. He could defeat most of the villains with just one punch. Maybe he'd start as an unknown hero and quickly rise to fame, causing both amazement and some unease among the established heroes like Superman or Batman.