The storyline would take a huge turn. Instead of the Empire rising as it did in the original, there could be a new era of peace. The Jedi Order might be restored more quickly, and Anakin could become a hero instead of Darth Vader.
If Anakin betrays Palpatine, many of the events in the Star Wars universe would be altered. Characters like Luke and Leia might have very different upbringings. There would be no need for a big rebellion against the Empire as the Empire might not even come to be in the same way. The political landscape of the galaxy would be completely different, with more balance and less tyranny.
Anakin might betray Palpatine to save someone he loves. If Palpatine threatened Padmé in some way, Anakin would surely turn against him. After all, Anakin's love for Padmé is one of his strongest driving forces.
The storyline would likely start with Naruto's disillusionment with Konoha. His actions would then shock his friends. Sasuke, for example, might initially be confused but then choose a side. There would be intense battles within the village as Naruto tries to fight against the forces that he now opposes. His former friends and comrades would be torn between loyalty to the village and their friendship with Naruto.
Well, it depends on who the different master is. If it was a Jedi known for strict discipline, Anakin might have become a more by - the - book Jedi. He could have been more in control of his fear, which was a major factor in his fall. The story would then shift as he would probably not be as tempted by Palpatine's offers. His skills would also develop in a different way. Instead of the aggressive style he had with Obi - Wan as his master, he might have a more refined, defensive approach.
The immediate effect would be a huge shock to Naruto. His trust in Tsunade would be shattered, and this could lead to a period of self - doubt for him. He might question his own judgment in trusting people.
If Ahsoka were pregnant, Anakin's relationship with her would change drastically. He would be filled with a mix of joy and fear. Joy because of the new life they are bringing into the world, but fear because of how the Jedi Order would react. They would have to keep their relationship and the pregnancy a secret at first. This secrecy would create a new level of intimacy between them as they share this huge secret. As time passes, they would have to make decisions about their future, whether to stay with the Jedi or leave and start a new life together, which would put a strain on their relationship in different ways.
It could have completely changed the course of the Star Wars universe. With Palpatine out of the picture, the Sith might have crumbled and the Jedi could have regained their influence.
It would have a huge impact on the characters. For example, Luke and Leia would grow up in a very different environment. Without Palpatine's influence, the Rebel Alliance might not have had as strong a cause, but there would still be a need to restructure the galaxy. Anakin's actions would also change the perception of the Force. The balance between the light and the dark side would shift, and the Jedi might have to reevaluate their teachings. It could lead to a more harmonious coexistence of the different Force - using groups in the long run.
If Kushina were alive in Naruto fanfiction, it could change the story in many ways. For one, Naruto would grow up with a mother figure. He might not have faced so much loneliness and discrimination in the village as Kushina could have protected him. Also, Kushina was a powerful kunoichi. She could have trained Naruto herself, perhaps passing on unique Uzumaki techniques earlier. This could have made Naruto even stronger, more quickly.
Well, if Naruto was trained by Kushina in fanfiction, it could make him a lot more in - touch with his Uzumaki heritage from the start. He might learn unique Uzumaki jutsus earlier, like some powerful sealing techniques. Also, Kushina's feisty personality could be passed on more directly, making Naruto even more determined and head - strong in a different way than in the original story.
If Naruto was born a Saiyan, the entire Naruto storyline would be completely different. For starters, he'd likely have a tail and the ability to transform into a Great Ape. His power level at a young age would be much higher than in the original story. Instead of learning ninja techniques like the Rasengan, he might focus on mastering Saiyan ki blasts. His goal might not be to become Hokage but rather to become the strongest Saiyan in the universe, or at least on Earth. Also, his relationships with characters like Sasuke would change. Sasuke might see Naruto as an even greater rival, not just in ninja skills but also in raw power.