In some fanfictions, Bakugo can become more empathetic. For example, if he experiences a situation where he realizes the pain he's caused Deku over the years. His aggressive nature might soften as he starts to understand Deku better. Deku, on the other hand, could become more assertive. Instead of always being the timid one, he might stand up to Bakugo more firmly in fanfiction scenarios.
One interesting fanfiction could be where Deku and Bakugo have to team up for a special mission outside of UA. They start off bickering as usual but gradually learn to trust each other more deeply. Another could be a story set in an alternate universe where they are not rivals but friends from the start, and they help each other develop their quirks in different ways. There are also fanfictions that explore their relationship in a post - war scenario, dealing with the trauma and how they support each other through it.
One plot idea could be that Bakugo and Uraraka are paired up for a special training mission. They start off clashing because of Bakugo's brash nature and Uraraka's more easy - going style. But as the mission progresses, they learn to understand each other's strengths. For example, Bakugo's powerful attacks combined with Uraraka's zero - gravity quirk could create some unique combat strategies. Another idea is that they get involved in a mystery within the school that only their combined efforts can solve. Maybe there are strange disappearances and they have to rely on each other to figure out what's going on.
In the manga, Bakugo has had many significant moments. He's dealt with internal struggles, formed new friendships, and taken on challenging missions that have shaped his character.