One interesting idea could be exploring the backstories of the robots in more detail. For example, what were their initial programming thoughts and feelings before they started interacting with humans? Another could be imagining new types of robots that were not in the original I, Robot story, like robots with the ability to create art or music.
One idea could be a crossover with a detective story. The robots in 'I, Robot' could assist a detective in solving a complex crime that involves both human and robotic elements. For example, a robot might have witnessed a murder but its programming restricts it from fully disclosing what it saw. The detective has to figure out how to work around the robot's limitations to get the information they need.
Maybe a story where a human engineer creates a highly intelligent robot. The robot becomes the human's closest friend and together they solve mysteries or go on adventures. The robot could have unique abilities that help them in their quests.
One idea could be creating a robot OC that has the ability to transform into different forms inspired by the various Grimm in RWBY. For example, it could shift into a Beowolf - like form for combat situations. Another idea is a robot OC designed by a villainous character in the RWBY universe but ends up having a change of heart and joins the heroes. You could also have a robot OC that has a unique Dust - based power system, which is different from the normal ways Dust is used in RWBY.
Another interesting concept is a robot OC that was created by a villain but has a change of heart. This robot could struggle with its programming and new - found sense of morality. It might have to hide its true identity from both heroes and villains while trying to do good in the world of BNHA.
Well, a plot could revolve around a robot that has the ability to copy magic. It joins Fairy Tail to learn more about different types of magic, but some of the guild members are suspicious of it. As it tries to prove itself, it gets involved in a big conflict against an enemy who wants to use its magic - copying ability for evil. Also, there could be a story where a Fairy Tail mage creates a robotic sidekick. They go on adventures together, and the robot has unique abilities that complement the mage's magic, like being able to analyze an opponent's weaknesses quickly.
One idea could be a scientist who is experimenting on artificial intelligence and accidentally gets his own consciousness transferred into a robotic body. He then has to deal with the new limitations and capabilities of the robotic form while trying to find a way to reverse the process.
Perhaps the OC is a creation of a mad scientist who wants to use Ultron's technology to enhance their own creation. The OC then rebels against the scientist's control and teams up with Ultron for mutual benefit, leading to a series of adventures where they face various challenges together, such as fighting off military forces trying to destroy them.
One idea could be that the fem robot is created by Orochimaru for some evil purpose, but Naruto befriends her and she starts to develop emotions. She then helps Naruto fight against Orochimaru's other creations. Another could be that the fem robot is from a far - off land and Naruto meets her during one of his travels. She has unique powers that Naruto has to learn to work with in order to save the village from a new threat. A third plot idea is that the fem robot is a failed experiment by Konoha's scientists, and Naruto takes it upon himself to fix her and in the process, they form a special bond.
A fan fiction could revolve around Robot Jones getting a software upgrade that gives him new emotions. He then has to learn how to deal with these emotions in the context of his daily life at school and with his friends.
The OC could be a therapist who is assigned to treat Elliot. At first, Elliot is very resistant to the idea of therapy. However, the OC is persistent and gradually breaks through his walls. As they interact more, the OC starts to understand Elliot's complex mind and the world of hacking he is involved in. This leads to a romantic connection as the OC becomes a part of Elliot's world and helps him in his fight against Evil Corp.