Another theme is understanding. By watching his past, the Avengers gain a deeper understanding of Loki. They see the events that made him who he is, which could lead to more empathy towards him in the story.
They might see events that shaped Loki into the mischievous and sometimes villainous character he is. For example, the discovery of his true heritage. This could make the Avengers more sympathetic towards Loki, or it could make them more cautious, seeing how his past traumas have influenced his actions. In fanfiction, there could be all sorts of creative interpretations of these past events that would surprise the Avengers.
One common theme could be the struggle for control. Loki, being in a state of 'heat' might have a harder time controlling his emotions and powers, and the Avengers would then have to deal with this new and unpredictable factor. Another theme might be acceptance. The Avengers might have to accept this new side of Loki and figure out how to work with him in this state.
One common theme is redemption. Loki is often portrayed as seeking redemption for his past misdeeds while working with the Avengers. Another theme is the clash of personalities. The Avengers have very different personalities from Loki, and this often leads to interesting conflicts and resolutions. For example, Thor's relationship with Loki adds an extra layer of drama.
One common theme is the shock and adjustment of the Avengers. They have to get used to the idea of Loki, who was once an enemy in some cases, being pregnant. Another theme is the protection of Loki and his unborn child. The Avengers often come together to safeguard them from potential threats. And there's also the theme of Loki's internal struggle, dealing with his new condition while also having to interact with the Avengers who have a complex history with him.
One common theme is redemption. Loki often has a journey of self - discovery and trying to make up for his past wrongs, and Jane can be a part of that process. For example, in many fics, Loki sees Jane's goodness and it makes him want to be better.
Redemption is a very common theme. Since Loki has a rather villainous past in the original lore, many fanfictions focus on him trying to make up for his wrongdoings and be accepted as a good guy by the Avengers.
One popular 'Avengers watch Loki's past' fanfiction is 'Loki's Hidden Memories'. It delves deep into Loki's past traumas and how the Avengers react to seeing his true origin story. They start to understand his motives better.
A prevalent theme is identity. In these fanfictions, Loki's sister often has to figure out who she is in relation to Loki, Thor, and the Avengers. Is she a villain like Loki or a hero? This internal struggle is a big part of many stories. Also, the theme of redemption can be seen. Similar to Loki, she may try to atone for her family's wrongdoings or her own past mistakes and find acceptance among the Avengers.
In many of these fanfictions, the theme of acceptance is prominent. Loki's wife has to accept who Loki is, with all his flaws and his Asgardian heritage. There's also the theme of family, as they might interact with other Avengers who are like an extended family. And sometimes, there are themes related to magic and the supernatural, given Loki's powers and the overall magical elements in the Marvel universe.
One common theme is redemption. Since Loki has done a lot of bad things in the original stories, many fanfics focus on him trying to make up for his past actions and gain the trust of the Avengers. Another theme is family, especially his relationship with Thor which often plays a big part in the stories. Power is also a theme, like how Loki's magic can be both a threat and an asset to the Avengers.