Well, in fanfiction, if Team Minato watches Obito's future, they might be shocked. For example, they would witness his alliance with Madara and all the destruction he causes. It would be a moment of self - reflection for them. Minato might blame himself for not being there for Obito when he needed it most. Kakashi would also have a hard time seeing his old friend turned into an enemy.
In a fanfiction where Team Minato meets future Obito, it could be a very emotional encounter. Minato might be shocked to see how Obito has changed. Obito, having experienced so much in the future, could bring warnings about future disasters. For example, he might warn about the upcoming threats to Konoha. Team Minato would have to grapple with the knowledge that Obito is no longer the person they once knew.
One common theme is redemption. Since Obito has made many mistakes in the original Naruto story, in time travel fics, he often gets a chance to right his wrongs through his interactions with Minato. Another theme is the alteration of fate. Time travel allows for the possibility of changing the pre - determined course of events in the Naruto universe.
Well, if Naruto fought Minato in a fanfiction, Naruto could win. He has the Nine - Tails' chakra and has trained with some of the greatest shinobi. But Minato is no slouch. He was a prodigy in his time. However, Naruto might have a chance if he combines his Sage Mode with the Nine - Tails' power. This could overpower Minato's speed - based techniques. It's all speculation though, as it's a fanfiction scenario.
Well, there's a fanfiction called 'Time - Bound Encounter'. In this story, Obito's time travel brings him face - to - face with a younger Minato. It explores their different ideologies and how they come to understand each other better through this time - warped encounter. Also, 'The Time - Twisted Bond' is a great read. It shows how Obito's time travel alters the pre - existing relationships and how Minato reacts to the sudden appearance of this time - traveling Obito.
Some fanfictions turn Minato into a more complex and flawed character. Instead of the perfect hero he is often portrayed as, he becomes a man who made a big mistake in neglecting his son. This can lead to different relationships between Minato and other characters as well, like how Kushina might react to his neglect of Naruto.