They could develop a more complex relationship by facing external threats together. After the kiss, they realize that they are stronger united. As they fight off common enemies, they learn to trust each other more. This new - found trust could lead to a deeper emotional connection, perhaps even evolving into a loving and respectful relationship over time.
In some lemon fanfictions, their relationship might develop more quickly. For example, Simba could have a series of adventures where he discovers more about his father's past in a very short time. This new knowledge could make him idolize Mufasa even more and strive to be like him sooner.
In The Lion King story, Mufasa is the symbol of a just and powerful king. He is loving towards his family, especially Simba. He imparts important values to Simba like respect for all creatures. The story takes a dark turn when Scar, envious of Mufasa's power, tricks Simba into leading Mufasa into danger during a wildebeest stampede. Mufasa's death is a turning point. It not only shatters Simba's world but also leads to Scar taking over the throne unjustly, until Simba returns as an adult to reclaim his rightful place, all of which was set in motion by Mufasa's untimely death.
Mufasa's long story might revolve around his family. For instance, his bond with his son Simba. It could tell of the lessons he passed on to Simba, how he taught him about the Circle of Life, and his hopes for Simba's future as a future leader of the pride.
There could also be a plotline where there is some sort of danger threatening the Pride Lands. Kovu and Mufasa, despite their differences, team up to face this threat. Kovu brings his unique skills and knowledge from his pride, and Mufasa uses his wisdom and leadership. As they work together, they develop a mutual respect for each other that was not there before.
In this fanfiction, it could be that Mufasa is brought back to life by some magical force. When he meets Simba, there is an initial shock and then pure joy. They then set out to restore the Pride Lands to an even greater glory. Mufasa shares his long - lost knowledge about the hidden parts of the Pride Lands, and together they form a stronger bond as father and son while working towards the betterment of their kingdom.
The main themes include the importance of responsibility. Mufasa has the responsibility to rule the Pride Lands well. Also, there is the theme of growing up. Simba has to grow up and face his responsibilities after Mufasa's death. And friendship is there too, like Simba's friends who help him.