For Naruto, it could accelerate his growth not just in terms of power but also in maturity. Spending a long time alone in the chamber, he might have deep self - reflections and come out with a better understanding of his purpose and responsibilities.
One idea could be Naruto using the hyperbolic time chamber to train intensively for a new and extremely powerful jutsu. He could emerge with a whole new set of skills that surprise his friends and foes alike.
There were a few novels where the protagonists were trapped in an infinite cycle of time. Among them were "I drank the potion in the mysterious recovery","Reincarnation, from this moment on","Infinite from the Shura Eye to the Reincarnation Eye", and so on. These novels were all about the infinite heavens or the heavens. The main character was trapped in reincarnation and experienced countless hardships to break free from the cage of reincarnation. These novels were all very interesting and worth reading. I hope you like this fairy's recommendation. Muah ~😗
Well, Vegeta would be a likely character. He might be initially suspicious of the female Goku. Maybe he thinks she's a threat or just can't believe there's another Goku - like being. He could be there to add some comical moments as he tries to understand the situation.
In general, it's a bit of a toss-up. The strength of Manga Goku and Anime Goku can vary depending on the specific arcs and battles. Sometimes, it might seem like one is stronger in a particular situation, but that could change in another.
Well, he might meet different versions of himself from various time periods. Maybe he'd have to team up with his past self to solve a mystery that spans across time.
One could expect an exciting adventure. Maybe it'll involve Goku's power being used in a unique way to protect the timeline that Supreme Kai of Time oversees. It could also show a different side of their relationship, perhaps a friendship that develops as they face challenges together.
Another possible main character could be the villain that forces the two Gokus to meet. This villain could be a new, super - powerful threat that the two Gokus need to deal with. Their meeting becomes a crucial part of the story to defeat this powerful foe.