For a more action - packed fanfiction, they could be pitted against a villain who has the ability to manipulate time. This would force Peter and Diana to not only use their physical abilities but also their wits. Peter's scientific knowledge and Diana's wisdom from her long life would be crucial in figuring out how to defeat the villain. They would have to trust each other completely, which would strengthen their bond as they face this time - bending threat.
In a Peter Parker and Diana Prince fanfiction, they might meet during a multiverse - related event. Peter could be accidentally pulled into Diana's universe. Their first encounter would be full of confusion, with Peter cracking jokes and Diana being all serious. But soon they realize they can help each other out.
A fanfiction could explore the idea of Peter being in awe of Diana. He has seen powerful heroes, but Diana's presence and the way she carries herself is something else. Meanwhile, Diana sees Peter as a symbol of a different kind of heroism, one that is more down - to - earth and relatable. Their relationship could grow as they train together, with Peter learning new combat techniques from Diana and Diana getting a better understanding of street - level heroics from Peter.