One idea could be to explore how they prepare for the arrival of their new 'bot. They might have to make adjustments to their living quarters in Cybertron. For example, they could be seen building a special nursery area with all the latest technology to ensure the well - being of their soon - to - be - born child.
The Autobots would likely be very surprised at first. Bumblebee might be confused but also very protective. He'd probably try to keep Optimus safe from any potential threats. Ratchet, as the medic, would be both concerned and intrigued. He'd want to make sure Optimus is healthy during the pregnancy.
One possible plot could be that Optimus Prime discovers he's pregnant through some sort of strange energy transfer. He then has to deal with the reactions of his fellow Autobots. Some might be shocked, while others try to support him. Another idea is that the pregnancy is a result of an experiment by the Decepticons gone wrong, and Optimus has to protect himself and the unborn life from their attempts to use it for evil.
It's possible. Fanfiction often takes existing characters and gives them new storylines. In the case of Optimus Prime and Arcee, a 'pregnant' fanfiction could be about them having a new form of life or a project that they are nurturing together, which is presented as a pregnancy - like concept. You may need to do some digging through various fanfiction communities and websites to find one that suits your taste and is suitable for all viewers.
There might be some very creative and out - of - the - box fanfiction exploring such an idea, but it's not a common or mainstream concept within the Transformers fandom. Usually, Transformers are depicted as mechanical beings, and pregnancy is a biological concept more related to organic life forms. However, in the realm of fanfiction, the sky's the limit for creativity.
One possible fanfiction could be about Sentinel Prime and Optimus Prime having to work together to save Cybertron from a new, powerful enemy. They might start off with some differences in their approaches but gradually learn to combine their strengths.
Optimus Prime could fit in as a powerful ally. He would be like a super - powered being in the RWBY world. His presence could shake up the power balance. Maybe he arrives through a portal and immediately starts helping the RWBY teams fight the Grimm. He could be seen as a symbol of hope, much like the Huntsmen and Huntresses are in RWBY.
To write their relationship development, start with their initial reactions to the pregnancy. Maybe Optimus is initially overprotective and Elita One has to remind him she's still a strong warrior. Then, as the pregnancy progresses, they could have small, tender moments like sharing memories of their past battles and how they hope their child will be like them in some ways.
Once upon a time, Optimus Prime led the Autobots on a mission to a distant planet. The planet was filled with strange energy sources that could either be a great power boost or a deadly trap. Optimus, with his unwavering courage, decided to explore it first. As he ventured into the unknown, he faced many challenges and strange creatures. But he never wavered, for he knew the safety of his team and the future of their cause depended on his actions.
Bumblebee and Optimus Prime fanfiction also attracts fans because it can bring a sense of community. Fans can share their stories, discuss different interpretations, and collaborate on ideas. It's not just about the individual stories, but also about the collective love for these characters. Reading and writing fanfiction can create a bond among Transformers fans all over the world.