One idea could be that Link, from Legend of Zelda, somehow gets transported to the Naruto universe. He might initially be mistaken for a strange shinobi with his unique green tunic and hat. Link could use his combat skills, like swordsmanship and shield defense, to team up with Naruto and his friends against common enemies, such as the Akatsuki who are after powerful artifacts. Maybe the Ocarina of Time has some sort of power that the Akatsuki wants, and Link has to protect it while in this new world.
One interesting storyline could be where Naruto characters are teleported to the world of Zelda. Naruto, with his determination and never - give - up attitude, might take on the role of a hero in the Zelda world. He could use his shadow clones to solve puzzles or fight off hordes of Bokoblins. Another could be Link getting the ability to use chakra, which would completely change the way he battles enemies. He could use ninjutsu techniques along with his swordsmanship, creating a unique combat style.
The relationship between the sages in Legend of Zelda and the Kage in Naruto could be interesting. The sages, with their connection to the elements and ancient magic, could offer their wisdom to the Kage. The Kage, in return, could provide protection and resources. For example, the Fire Sage could collaborate with the Fire Daimyo in Naruto's world. In terms of individual relationships, Tenten might be fascinated by Link's arsenal of weapons and try to learn from him. And Shikamaru might find Zelda's strategic thinking in combat and magic usage very interesting, and they could have long discussions about battle tactics.
Maybe Zelda herself could be transported to the Avengers universe. With her wisdom and magic, she could assist the Avengers in different ways. She could use her magic to heal the wounded Avengers or help Tony Stark understand some ancient technology that has similarities to her own world's tech. She could also provide strategic advice based on her experience dealing with Ganon in her own realm.
Naruto's Rasengan could be combined with Link's spin attack. Link could use the chakra - infused Rasengan in his sword for a more powerful strike. Also, Naruto's ability to sense chakra could help in detecting hidden treasures or enemies in the Zelda world, which are often masked by magic.
For Naruto characters in a Zelda - inspired world, they could adapt their skills. Naruto might learn to use the Master Sword, and his rasengan could be modified to work with the magical elements of Zelda. Sasuke could use his sharingan to detect hidden passages or secrets in Zelda's dungeons.
One more theme is the exploration of different moralities. The relatively simple good - vs - evil in Hyrule is contrasted with the more complex moral landscape of the DC Universe. This can lead to some interesting internal struggles for the characters as they navigate these different moral frameworks and try to figure out who the real enemies are and who can be trusted.
Some great Legend of Zelda crossover fanfiction concepts include a crossover with the Sonic the Hedgehog series. Link could be racing through the Green Hills Zone on Epona. A crossover with the Super Mario Bros. universe is also a fun idea. Link and Mario could join forces to rescue Princess Zelda and Princess Peach from the clutches of their respective villains. Additionally, a crossover with the Kingdom Hearts series would be epic. Link could interact with Sora and the other Keyblade wielders, exploring different Disney and Zelda worlds together.
It could be about Link ending up in Equestria and teaming up with Twilight Sparkle to fight a new evil that threatens both their worlds. Maybe Ganondorf has found a way to enter Equestria and is causing chaos, and Link uses his combat skills while Twilight uses her magic to drive him out.
One common theme is the clash of different powers. Naruto's chakra - based abilities and the magic of Zelda are often pitted against each other or combined in unique ways.