Well, in this kind of fanfiction, Minato might be able to use his powerful jutsu to take on the Akatsuki members one by one. He could teach Naruto some secret techniques that he never had the chance to before. And maybe he would reform the Leaf Village's defenses to better protect against future Akatsuki threats.
The Akatsuki would still likely be the main antagonists. They have their own goals that often conflict with the well - being of the ninja world. Even with Minato alive, they are a powerful and organized group that would pose a great threat.
One interesting scenario could be Naruto having to face multiple Akatsuki members alone and using new, unexpected jutsu. For example, he might combine his Rasengan with Sage Mode in a unique way to counter their attacks.
Konoha vs Akatsuki in a Naruto fanfic is a really interesting concept. Konoha represents the forces of good and order. They have a lot of resources and support from the village. Akatsuki, on the other hand, is a group of outcasts with unique and often extremely powerful abilities. In a fanfic, the outcome could be swayed by many factors. For instance, if the fanfic focuses on the power of friendship and teamwork in Konoha, they might prevail. But if it's more about the individual might of Akatsuki members, then Akatsuki could come out on top. Also, the presence of certain characters like Sasuke and his choices could greatly impact the result.
One key battle could be Naruto vs Itachi. Itachi is a very powerful Akatsuki member and Naruto has his own strong powers. Another might be Kakashi against Kisame. Kakashi is a skilled Konoha ninja and Kisame is a formidable Akatsuki member. Also, the fight between the Hokage of Konoha and the leader of Akatsuki would be crucial.
It's really hard to say. Minato is extremely fast with his Flying Raijin and is a very intelligent fighter. But Naruto has an incredible amount of chakra, his Sage Mode, and his Six Paths powers. If Naruto can get close enough to Minato, his brute strength could overpower Minato. However, Minato's speed and strategic mind might keep Naruto at bay.
In some 'minato vs naruto fanfiction', there could be a scenario where they battle in a different dimension. Minato uses his Flying Raijin to quickly move around and Naruto counters with his shadow clones and massive Rasengan attacks. Also, a scenario where they fight not as enemies but in a friendly spar to teach Naruto some secret family jutsu that only Minato knew would be really cool.
There are many out there. A really good one might focus on the emotional reactions of Team Minato. For example, Minato might be proud of Naruto's strength and how he overcomes Pain. Kakashi could be in awe at Naruto's new techniques. Their reactions can enhance the overall viewing experience in the fanfiction.
You can try looking on popular fanfiction websites like FanFiction.net or Archive of Our Own (AO3). They usually have a wide range of Naruto - related fanfictions, and you should be able to find some with the 'Team Minato Watches Naruto vs Pain' concept.
Minato would likely be extremely shocked. Naruto is his son, and the idea of Naruto attacking him would be completely unexpected. He would probably try to talk to Naruto first, to find out what is wrong and why he is being attacked.