Jericho is sometimes classified as a villain in DC Comics. His character has gone through various developments and transformations, and his villainous status depends on the specific context and plot.
Well, 'Blackest Night' has some amazing DC villain stories. In this, Nekron, the lord of the dead, rises and turns many heroes and villains into his Black Lanterns. It's a complex and dark story. Also, 'Lex Luthor: Man of Steel' is a great one. It shows Luthor's hatred for Superman and his devious plans to bring the Man of Steel down. And don't forget about 'The Dark Knight Returns' where the Joker makes a comeback in a very dark and menacing way.
In 'The Killing Joke', the main villain is obviously the Joker. His maniacal laugh and his attempts to drive Commissioner Gordon insane are central to the story. In 'A Death in the Family', again it's the Joker who plays the key villain role by murdering Robin. And in 'Sinestro Corps War', Sinestro is the main bad guy, leading his fear - based army against the Green Lanterns.
Batman would definitely be one of the most affected. He's used to dealing with normal threats in Gotham, and Naruto's supernatural abilities would be a huge challenge. Another would be the Flash. Naruto's clones could potentially surround and confuse the Flash. Wonder Woman too. She's a warrior, but Naruto's unorthodox fighting style and his array of jutsu would be difficult for her to counter immediately.
Harley Quinn's origin is also quite unique. She was a psychiatrist at Arkham Asylum, but she fell in love with the Joker during her treatment of him. His influence and abuse led her to transform from a healer to a villain, a twisted love story that created a new kind of villain in the DC world.
In DC Comics, Joker and Batman are not siblings. They are arch-enemies with a history of intense conflicts and opposing ideologies. Their connection is based on the constant battle of good versus evil.
I recommend "This King's Surname is Wang." The main character of this novel was Wang Bingquan. He had obtained the inheritance of an immortal by chance and learned the secret martial arts. He had built the framework of the silly prince through repeated defeats and battles, and had begun his hegemony in another world. His grandfather was a soldier king and was very powerful. The plot of this book was wonderful, and Wang Bingquan's growth was enjoyable to read. I hope you like this fairy's recommendation. Muah ~😗
If Naruto becomes a villain in the DC crossover, he might set his sights on Superman. Naruto could believe that Superman's power is a threat to the balance he wants to create. He would use his ninjutsu to try and take on Superman. For example, he could use his Rasengan, a powerful spinning ball of chakra. However, Superman's strength and heat vision would be tough for Naruto to overcome. This would lead to an epic battle between the two, with the other DC heroes and Naruto's possible allies getting involved as well.