Well, there could be a plot where Oliver and Sara are forced to work with an unlikely ally. This ally has a secret that could either help them greatly or destroy their plans. As they work together, Oliver and Sara start to realize that their feelings for each other are more complex than they thought. Meanwhile, they have to deal with the consequences of their actions in the past catching up to them.
One plot idea could be Oliver and Sara teaming up on a dangerous mission in a new, uncharted territory. They face various challenges and in the process, their relationship deepens. Another could be a story where they have to protect a mysterious artifact that has some sort of connection to their pasts. Maybe there's a villain who also wants the artifact and they have to outwit him.
One possible plot could be that they discover the pregnancy during a mission. They then have to keep it a secret from their enemies while also preparing for the new life. Oliver might be overprotective, and Sara could be struggling with how motherhood will change her life as a warrior.
To develop Oliver further, he could be shown struggling with new moral dilemmas. For example, in a situation where saving one person means sacrificing many others. Sara, on the other hand, could be developed by exploring her past traumas more deeply. Maybe she has nightmares about her time with the League of Assassins that start to affect her current actions.
One idea could be that they discover the pregnancy during a mission. Maybe they're on a dangerous quest and Sara starts feeling unwell. It turns out she's pregnant, and they have to quickly figure out how to protect the baby while still completing their mission. Another plot could be that they initially struggle with the idea of becoming parents, given their dangerous lifestyles. They might worry about bringing a child into a world full of threats. A third idea is that their friends find out before they do, and there are some comical misunderstandings and attempts to break the news to them in a gentle way.
Well, I've come across some. One interesting one had a storyline where they were pregnant in an alternate universe where the Arrowverse had some really different events. It was really creative how the author incorporated the pregnancy into the already established characters' personalities and the overall story arc of the Arrowverse. Another one focused more on the emotional journey of Sara and Oliver dealing with the pregnancy in a world full of danger and secrets.
A plot where Alex and Sara are stranded on a deserted planet together. They have to rely on each other's skills to survive. Sara's combat and survival skills from her time as a pirate, and Alex's scientific knowledge could make for an exciting story of cooperation and friendship. It could also explore a possible romantic relationship between them as they grow closer during their time of isolation.
One idea could be that they have to protect their baby from a time - traveling villain who is after the baby's special powers. Another could be that they raise the baby in a world where they are trying to balance their former criminal and vigilante lives.
One plot idea could be that Sara and Felicity team up to solve a mystery that involves some high - tech gadgetry that only Felicity can understand and Sara's combat skills are needed to face the physical threats. Another could be a story where they get transported to an alternate universe and have to find their way back together, relying on each other's unique strengths. Maybe they start a detective agency together in Star City, with Sara handling the more dangerous field work and Felicity doing the research and tech support from their headquarters.
One plot idea could be that Hermione, using her magic, ends up in the Arrowverse and meets Oliver Queen. She helps him with some of his more difficult battles using her spells and intelligence. For example, she could use a spell to disarm his enemies from a distance.
Another plot could be that they are trapped in an alternate timeline where they have to rely on each other completely to find their way back home. During this time, they learn about each other's past traumas and help each other heal.
Another plot could revolve around the challenges of raising a baby in their dangerous world. They have to constantly protect the baby from their enemies. Maybe there are villains who try to kidnap the baby to get to Oliver or Felicity. So they have to set up a super - secure hideout and enlist the help of their friends like Diggle.