One interesting storyline could be how the characters deal with the increasing danger and fear during the second war. For example, Harry might be on a quest to find a powerful magical artifact that could turn the tide of the war.
One great post - war Harry Potter fanfic is 'The Life and Times of Harry Potter'. It delves into how Harry and his friends are rebuilding the wizarding world. It shows their struggles in dealing with the aftermath of the war, like healing the psychological traumas and restoring Hogwarts. Another interesting one is 'After the Battle'. It focuses on the new relationships that form and the changes in the social structure of the wizarding community post - war.
In this type of fanfic, the Infinity Stones could have a very different effect in the Harry Potter universe. For example, the Time Stone could be used to reverse dark spells or resurrect fallen wizards. However, the Stones' power might also be limited by the magic rules of the wizarding world. The fanfic could delve into how the characters from both universes adapt to the presence of the Stones and how they use or misuse their power.
Well, it could be that Voldemort teams up with Thanos somehow. Maybe Voldemort is attracted by the power of the Infinity Stones. He could use the Time Stone to go back and change some key events in the wizarding world to his advantage, like preventing Harry's parents from being protected by the Fidelius Charm.
Well, in many 'war veteran Harry Potter fanfic', a prevalent theme is the clash between the veteran's war - toughened mindset and the more innocent world of Hogwarts. They bring in a sense of realism and harshness. Another common theme is the veteran's role as a protector. They've seen the worst in war, so they are determined to protect the students and the wizarding world from any new threats. And of course, the theme of dealing with loss is also quite common. They've lost comrades in war and have to learn to live with that in the fanfic world.
Well, Harry Potter could use his magic skills. For example, he could use the Patronus charm to fend off some of the alien creatures in Infinity War. His knowledge of spells like Expelliarmus could also be used to disarm the villains' weapons.
It could be about giving characters in the Harry Potter universe a second chance at something. Maybe a character who made a big mistake gets a chance to redo a decision. For example, if Neville Longbottom had a second chance to stand up to Voldemort earlier in the story, it could change a lot of things.
Well, just based on that title alone, it's difficult to determine its quality. There are so many aspects that make a Harry Potter fanfic great. For example, it could explore new relationships between the characters, or create exciting new magical adventures. But we don't know if 'skull is harry potter fanfic' does any of those things. So, it might be good, it might not.
Well, George Weasley could be a main character. After losing Fred, he could be trying to keep the joke shop going while also dealing with his grief in a post - war world. Cho Chang might be another main character. She could be working with international wizards to strengthen relations between different wizarding communities after the war. And Seamus Finnigan could be part of the group. He could be involved in some magical research related to how to prevent future dark wizards from rising, using his experiences from fighting in the war.