One common theme is the struggle against supernatural forces while maintaining their relationship. Given their world filled with magic and monsters, it's often a central plot point.
You can try fanfiction platforms like Archive of Our Own (AO3). It has a vast collection of fanfics, and you can simply search for 'Hope Mikaelson x Landon Kirby' in the search bar. There are often filters to sort by popularity, rating, etc.
One possible fanfiction could be that Hope discovers she's pregnant unexpectedly. She's initially scared as she and Landon are still young and facing many challenges in the supernatural world. Landon, on the other hand, is overjoyed and promises to be there for her no matter what. They then start preparing for the baby's arrival, all while dealing with the threats from the various dark forces in Legacies.
One idea could be a crossover with the Vampire Diaries. Hope could meet Elena and they could form an unlikely alliance against a new threat in Mystic Falls. Maybe a powerful witch from another dimension is causing chaos and their combined powers are needed to stop it.
I also like the fanfic 'Mikaelson Heir: Hope'. It focuses on Hope as she steps into her role as the heir of the Mikaelson family. It shows her facing various challenges and how she overcomes them with her unique blend of strength and compassion. There are some great character interactions that make it a must - read for any Hope Mikaelson fan.
One great 'Hope Mikaelson Fanfiction' is 'The Ascent of Hope'. It delves into Hope's journey of self - discovery and her struggle with her unique powers. Another interesting one could be 'Hope Among the Shadows' which focuses on her relationships within the Mikaelson family while facing external threats.
It might start off rocky. Klaus is very protective of Hope, so he could be hostile towards Landon at first. But as time goes on, if Landon shows he's truly good for Hope, Klaus could slowly warm up to him.
One popular trope is the 'enemies to lovers' scenario. Given their complex relationship in the show, it's often explored in fanfiction where they start off at odds but gradually fall in love. For example, they might be on opposite sides in a battle at first and then realize their feelings for each other.
The theme of redemption can also be found in some Hope Mikaelson fanfictions. Given the actions of her family in the past, she might be on a journey to make up for some of the wrongdoings associated with the Mikaelson name. And of course, love. There are fanfictions that explore her romantic relationships, whether it's with a new character or someone from the existing universe.
There could be a fanfic where Hermione babysits Hope in a world where the wizarding world and the world of the Mikaelsons collide. Hermione has to deal with not only Hope's supernatural powers but also the cultural differences between her own magical upbringing and that of the Mikaelsons. For example, she might be confused by some of the vampiric or werewolf traditions that are part of Hope's family background. But in the end, she forms a strong bond with Hope through her patience and intelligence.