One great Overwatch Bastion crossover fanfiction is 'Bastion in Another World'. It has Bastion being transported to a fantasy realm. The author does an amazing job of describing how Bastion's mechanical nature interacts with the magic of the new world.
There's also 'Bastion and the Cybernetic Alliance'. In this fanfic, Bastion teams up with characters from other cybernetic - themed universes. It's full of action - packed battles and interesting character dynamics. The way the writer blends different universes' technologies is really cool.
Another reason is that fans love to explore different scenarios for Bastion. In crossover fanfics, Bastion can be put in situations that are not possible in the original Overwatch game. For example, Bastion could be in a world full of magic and have to adapt. This creates a lot of interesting storylines.
There's a fanfic where Genji from Overwatch gets transported to the Naruto universe. In this story, Genji has to adapt to the ninja way of life. He learns about chakra and how to use it, while also teaching the Naruto characters some of his own skills. It's really interesting to see how the two different power systems interact.
One great Overwatch Reaper crossover fanfiction is 'Reaper in Another World'. It combines the dark and brooding nature of Reaper with a new, fantastical setting. The author does a great job of keeping Reaper's character intact while exploring new storylines.
The Bastion origin story in Overwatch is about a war machine that was created for combat. Bastion was part of a large army of mechanical units. After a great war, Bastion was damaged and lay dormant in a forest. There, it began to interact with nature and developed a new understanding, rather than just being a tool for destruction.
One possible plot for this fanfiction could be that Bastion accidentally activates an ancient Omnic protocol. This protocol sends out a signal that attracts the attention of both Overwatch and a group of evil Omnics. The Overwatch heroes, including Bastion's friends like Torbjorn, come to Bastion's aid. Together, they have to fight off the evil Omnics and find a way to deactivate the protocol before it causes more chaos. It could be a story of friendship, sacrifice, and the struggle between good and evil in the Overwatch universe.
One common theme is friendship. Bastion, being a rather unique character in the Overwatch universe, often forms unexpected friendships in fanfiction, especially with other heroes. Another theme is redemption. Bastion's past as a war machine can lead to stories where it tries to atone for its actions. And of course, there are also romantic themes in some of the fanfictions, exploring a relationship between Bastion and another character.
One good example could be those that explore Bastion's discovery of the world beyond combat. They might focus on his interactions with nature, like when he encounters a lemon tree. The author could describe how Bastion is intrigued by the lemons, their smell and texture, and how this simple encounter changes his view of the world a little bit. This kind of fanfiction can add depth to Bastion's character in a rather unique way.
A common theme is friendship. Given their different backgrounds - Bastion being a reformed war machine and Orisa being a protector - their friendship can be really interesting to explore. They learn from each other.
One interesting Bastion Overwatch fanfiction could be about Bastion's journey to discover more about the world beyond the battlefield. Maybe it shows Bastion interacting with different characters in a peaceful setting, like exploring a new city with Tracer as a guide.
Definitely Torbjorn. Since he has a connection with Bastion in the original Overwatch lore, he would be a central character. Reinhardt could also be involved. His chivalrous nature might lead him to protect Bastion if he saw it was in trouble. And of course, Mercy. She's always there to heal and help, so if Bastion gets damaged during the story, she would be there to patch it up.