One possible aspect of a Naruto and Talia al Ghul fanfiction could be a crossover of their worlds. Naruto's ninja skills and his strong sense of justice could interact in interesting ways with Talia's complex background in the DC universe. For example, they might team up to fight a common enemy that threatens both their realms. Naruto's ability to form strong bonds with his comrades could also influence Talia, who has often been in a morally grey area in her own storylines.
In a Naruto and Talia al Ghul fanfiction, the story could revolve around a mission. Maybe Talia needs Naruto's help to retrieve a powerful and dangerous object that has fallen into the wrong hands in the Naruto universe. Along the way, they learn about each other's cultures and fighting styles. Naruto could introduce Talia to the concept of chakra, while Talia could show Naruto some of the advanced technology and stealth techniques from her world.