One great fanfiction could be about Fear and Disgust having to work together to overcome a new emotion that has emerged in Riley's mind. Maybe they have to face an emotion that is a mix of confusion and sadness, and their combined efforts lead to an interesting adventure.
One common theme could be the exploration of their opposite natures. Joy is all about positive emotions while fear is more negative, so fics might play with how they interact with this contrast.
When writing an Inside Out Joy x Fear fanfiction, focus on their character arcs. Create a plot that challenges both of them. For instance, Riley is about to do something that she's never done before, like giving a big speech. Joy is all excited and wants to rush in, but Fear holds her back. This conflict can be the starting point of their journey. As they interact more, show their internal struggles. Joy might be afraid of losing her positive influence if she listens to Fear too much, and Fear might be afraid of being pushed aside by Joy. By exploring these complex emotions, you can create a rich and engaging fanfiction.
First, understand the characters well. Fear is always on edge and Disgust is, well, disgusted easily. Try to capture their voices accurately. For example, Fear might stutter or use a lot of 'what - ifs' in his speech. Disgust would use strong, judgmental language. Then, come up with an interesting plot. It could be something like they have to team up to stop a new emotion from taking over Riley's mind.
In a fanfiction, Joy and Fear could have a very interesting relationship. Maybe they start to understand each other better. For example, Fear could show Joy that being cautious sometimes is a good thing, and Joy could teach Fear that there is always something positive to look forward to even in scary situations.
There were a few novels about villains giving birth to babies that could be recommended. "The Beauty Is Pregnant and Gives Birth to the Villain" was a complete book. It told the story of the heroine in different worlds. She gave birth to the Villain's child and was doted on. In addition,"I Give Birth to the Villain (Quick Wear)" was also a fast-wear novel. The main character was Song Qiaoqiao, who also gave birth to the Villain's child and enjoyed his love.
Words and deeds are consistent, words and deeds are consistent, people judge a book by its cover, words and deeds are consistent, words and deeds are consistent.
We can probably expect great illustrations that bring the story of 'Inside Out 2' to life in a new way. Maybe new characters and their emotions will be depicted vividly.