There are many possible 'first saiyan god fan fiction' scenarios. Some might be set in an alternate universe where the Saiyan God's appearance changes the entire course of the Dragon Ball story. Maybe in this fan fiction, the Saiyan God unites all the Saiyans much earlier than in the original story. Or perhaps the Saiyan God discovers a new type of energy that is far more powerful than the Super Saiyan forms, leading to a whole new set of adventures and challenges for the characters.
Sure. One popular 'first saiyan god fan fiction' might be about the Saiyan God's origin story. It could explore how the first Saiyan achieved the God form, perhaps through a series of intense battles and self - discovery. Another one could focus on the relationships between the Saiyan God and other characters in the Dragon Ball universe, like how they interact with Goku or Vegeta.
Well, I'm not sure of a specific 'first saiyan god fan fiction' off the top of my head. But generally, in such fan fictions, they might play with the concept of the Saiyan God's powers. For example, they could create a story where the Saiyan God has to face an even greater threat than the usual villains in the series. It could also involve the Saiyan God passing on his knowledge or powers to other Saiyans in a new and unique way.
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Chapter 332, "Start the Live Stream!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event.
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Chapter 519, "I'm Here to Participate in the Program", is the clearest early answer because it turns Jin Siyue's situation into a concrete plot event.
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