One common theme is power dynamics. For example, when Sasuke is crossed over into a new universe, like the Marvel Universe, his power level is compared and contrasted with the existing heroes and villains. Another theme is identity. Sasuke often has to re - evaluate who he is in a completely different setting. In a crossover with the world of LOTR, he has to figure out how his ninja identity fits in Middle - earth.
There's a great sasuke centric crossover fanfiction titled 'Sasuke in Middle - earth'. In this story, Sasuke has to adapt to the different races and cultures of Middle - earth while still maintaining his ninja identity. His skills with the sword and his ability to sense danger make him a formidable presence in that world. Also, 'Sasuke and the Doctor' is quite good. Sasuke's adventures through time and space with the Doctor from Doctor Who offer a lot of exciting plot twists.
I think 'Sasuke's Ascent' is among the best. It follows Sasuke as he rises above his challenges and grows stronger. 'Sasuke: The Unseen Struggles' is a fanfic that shows the side of Sasuke that we don't often see in the original series, his daily struggles and how he overcomes them. Also, 'Sasuke in a New World' is really interesting as it places Sasuke in a completely different world and shows how he adapts and changes.
A sakura centric crossover in the world of Lord of the Rings is also an interesting idea. Picture Sakura in Middle - earth, her quick thinking and ability to adapt could make her a valuable ally. She could perhaps help the Fellowship with her knowledge of herbs for healing, and also use her combat skills against the orcs and other dark forces.
One great 'Stranger Things' crossover Steve - centric fanfiction is 'Steve in Another World'. It imagines Steve getting transported to a different dimension filled with characters from other shows. He has to use his wits and charm to survive and find his way back home. It's really exciting as it shows a different side of Steve.
One great 'Sasuke Crossover Fanfiction' is 'Sasuke in the World of Harry Potter'. It combines the ninja world of Sasuke with the magic of Hogwarts. Sasuke's skills and his complex personality make for an interesting dynamic in the wizarding world.
First, decide which two universes you want to cross over. For example, if it's Sakura and the world of Star Wars, research both universes thoroughly. Know Sakura's character traits like her determination and medical skills, and also understand the Star Wars universe's concepts like the Force and different species. Then, come up with a unique plot. Maybe Sakura is a Jedi - like figure in the Star Wars universe, using her chakra as a form of the Force.
A good 'Stranger Things Crossover Steve Centric Fanfiction' should stay true to Steve's character. He's known for his loyalty and his growth from a high - school jock to a more complex person. So, if the fanfic captures that, it's a plus. For example, if he's in a crossover situation, he should react in a way that's consistent with his 'Stranger Things' self.
The fanfic could start with Sakura in a desolate place, like an abandoned battlefield. She's talking to herself about Sasuke. She might be saying 'Sasuke, your power always amazed me, but now it scares me.' This could be because Sasuke has gone down a dark path and Sakura is trying to understand his actions while losing her own sanity in the process.
You can start by searching on popular fanfic platforms like Fanfiction.net or Archive of Our Own. Use keywords like 'Sasuke centric' and sort the results by popularity or ratings. Also, joining Naruto fan communities on social media platforms like Reddit or Discord can be helpful. Members there often share and recommend great Sasuke centric fanfics.