Perhaps a plot where Vegeta and Naruto have to team up against a common enemy from Vegeta's universe and Naruto's world combined. They would have to combine their unique powers like Naruto's Rasengan and Vegeta's Galick Gun. This would involve a lot of strategizing and learning about each other's abilities.
Another plot could involve Female Naruto being a ninja from a hidden village that was thought to be extinct. She meets Naruto while on a mission to seek help. Naruto is intrigued by her and they end up going on a journey together to revive her village, facing many challenges and enemies on the way.
A really cool plot could be that Gohan and Naruto get transported to an alternate dimension where they have to find a way back home. Along the way, they meet different versions of their friends and foes, and they have to work together to overcome the challenges of this strange new world. They might also discover some secrets about their own powers and the nature of their universes in the process.
One interesting plot could be two Narutos from different timelines meeting. They could exchange stories about their battles and growth, and then team up to face a new, powerful enemy that neither could defeat alone.
It really depends on the context. If it's a physical strength battle, Vegeta might have the upper hand initially due to his Saiyan strength. But Naruto has incredible stamina and the ability to tap into the Nine - Tails' power. So in a long - drawn - out fight, Naruto could potentially outlast Vegeta.
One possible plotline could be Vegeta and Bulma going on an adventure together to find a new power source for Capsule Corp. Another could be them dealing with a new enemy that specifically targets their relationship. And there might be a plot where they have to travel back in time and face challenges that test their love for each other.
In some fanfictions, a possible plot is that Fem Naruto uses her femininity to her advantage when dealing with the Kyuubi. She could charm or trick the Kyuubi in some way that Naruto in the original couldn't. Like, she might offer the Kyuubi something it really wants in exchange for its power, but in a more cunning way.
One possible interesting plot could be a story where Chichi and Vegeta are forced to team up for a mission. During this mission, they initially clash due to their different personalities but gradually start to respect each other. For example, Vegeta might be impressed by Chichi's determination to protect her family, and Chichi could see a different side of Vegeta that is more complex than she initially thought.
A possible plot could also revolve around a threat to the Earth where Vegeta and Bulma's relationship is put to the test. Vegeta has to go and fight, and Bulma has to deal with the fear of losing him. This could show the depth of their bond and how they support each other through tough times.
One interesting plot could be how Vegeta adjusts to the idea of becoming a father. He's a proud Saiyan warrior, and this new role might be a big challenge for him at first.
One possible plotline could be that when Vegeta first meets Bulma, he is initially dismissive of her because she is a weak Earthling in his eyes. But as time goes by, he starts to notice her intelligence and tenacity, which intrigues him. For example, she might be the one to figure out how to repair his spaceship, and he begins to see her in a new light.