Perhaps the Marauders watch the future and are shocked to find out that some of their group won't survive the upcoming wizarding wars. They might then start to take extra precautions and train harder to change that future. They could also see new friendships and alliances being formed in the future that they then try to encourage in their own time.
In this fanfiction, it could be that the future has a new Dark Lord. The Marauders are brought forward in time to stop this new threat. They face challenges like understanding the new forms of magic and technology that the future Dark Lord has harnessed. They also have to deal with the fact that the future wizarding world has different social and political structures. They might start by infiltrating the Dark Lord's lair using their Marauder's Map - like skills, but find that the map doesn't work as well in the future, leading to all sorts of interesting and dangerous situations.
One possible plot could be that the Marauders use a time - turning device by accident and end up in the future. They might be shocked by the advanced technology and different social norms. They could also meet their descendants or versions of themselves that are very different from what they expected.
They might be shocked by the advanced technology. For example, seeing flying cars and instant communication devices everywhere could leave them in awe.
Another possibility is that it focuses on the technological future of the Arcane universe. The story could be about how new inventions in Piltover are going to change the relationship between the two cities. There could be a scientist character who watches the future of technology and tries to either encourage or prevent certain advancements based on what they see.
Obviously, the Marauders themselves - James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew. Since it's about them watching the future, they would be the central focus. They are the ones who will have reactions and make decisions based on what they see in the future.
The main plot might center around a mystery that the ASL group stumbles upon in this future setting. It could involve a missing piece of technology or a person who holds the key to a new world order. They then have to navigate through a complex web of clues and face various antagonists who don't want them to uncover the truth. This would involve a lot of action, some tense moments of near - discovery and setbacks as they slowly piece together what's really going on.
Well, the relationship between the Marauders and female Harry is a major element. Are they supportive? Suspicious? How they interact can make or break the story. And the plot should be engaging. For example, if there are time - travel elements or if female Harry has a special mission in the future that the Marauders are watching unfold. There should be a good balance between action, mystery and emotional moments. Another thing to look for is how the fanfiction respects the original lore of the Harry Potter series while still bringing something new to the table with the female Harry concept.
Obviously, the Marauders themselves - James Potter, Sirius Black, Remus Lupin and Peter Pettigrew would be the main characters. They are the ones 'meeting' the future after all.
Maybe in the fanfiction, the story focuses on a character from the future coming back to the present in 'Jujutsu Kaisen Watch the Future'. This character has knowledge of future events that could either save or destroy the current world of Jujutsu sorcerers. The main characters then have to decide whether to trust this person and how to use the information without causing chaos.
One popular one could be 'The Future Through Their Eyes' where the Marauders observe a female Harry in a future where she has changed the wizarding world in unexpected ways. It's full of interesting character interactions.