One common theme is the cultural clash. Boa Hancock comes from Amazon Lily which has its own unique culture, and Luffy has his own way of life. So, in many fanfics, there's a focus on how these two different cultures interact during the wedding preparations and the event itself.
The wedding would probably be a huge and chaotic affair. There would be pirates from all over coming to celebrate. Luffy's friends like the Straw Hat crew would be there, of course. There would be lots of food and drink, especially meat for Luffy. The venue might be on an island they've visited before, like Sabaody Archipelago or even on the Thousand Sunny.
The story behind 'Lightning Crashes' is somewhat ambiguous and open to interpretation. It could be seen as a metaphor for the unpredictable nature of life and how even in the midst of chaos, there can be hope and renewal.
Well, you can try searching on some popular fanfic platforms like Archive of Our Own. There are likely many creative works there about their supposed wedding. Just use the search terms 'Boa Hancock and Luffy wedding' and you'll probably find a good number of fanfics to explore.
One quick fix could be to reinstall the game. This can solve problems with corrupted installations. Before doing that, make sure to back up your save files if possible. Another thing to try is to run the game as an administrator. Sometimes permission issues can cause crashes.
In a 'batman crashes on themyscira' fanfic, the story could start with Batman testing out a new experimental Bat - vehicle. There's a miscalculation or an attack during the test flight that sends him crashing onto Themyscira. The Amazons, led by Wonder Woman, are cautious. Batman, being the resourceful hero he is, tries to adapt to this new environment. He might learn about their culture while also trying to find a way to get back home and prevent any harm that his presence might bring to the island.
Well, perhaps Percy shows up at his own funeral in the fanfiction because he wasn't really dead. He might be confused as to why everyone thought he was gone and start revealing secrets that change everyone's perception of his 'death'.
Maybe there's an Amazon who has turned against her sisters and sees Batman's arrival as an opportunity to gain power. She could try to use Batman's technology for her own evil plans, and Batman would be caught in the middle between her and the rest of the Amazons.
It could trigger a funny or dramatic scene. Maybe it's part of a prank gone wrong, or it causes a character to have a sudden realization or change of heart.