The Flash might initially be in denial. He's used to Batman always having a plan and his death would be a huge shock. He would then turn his speed into a tool for investigation, trying to find out exactly what happened. Green Lantern could feel a sense of loss but also be spurred into action, using his ring to try and prevent future tragedies like Batman's death. He might create constructs in Batman's memory to inspire the team.
One common theme is the outsider trying to fit in. The male OC often comes from a different background or has unique abilities that set him apart from the well - established Justice League members. Another theme is redemption. Maybe the OC has made mistakes in the past and is seeking to make amends through his association with the League. Power and responsibility is also a big theme. Just like in the original Justice League stories, the OC has to learn how to use his powers for good.
There could be a story where an OC has the power of telepathy but is initially shunned by the Justice League because they're afraid of this new power. The OC then has to go through a journey of self - discovery and also convince the League that they can be an asset, perhaps by using their power to stop an alien invasion that was hidden from the League's normal detection methods.
OCs that have interesting backstories tend to be popular too. An OC who was a former villain but has now turned to the side of good and is trying to make amends with the Justice League can be really engaging. Their struggle between their past and present selves can add a lot of depth to the story.
One idea could be that the female vampire OC is initially a foe. She might be causing chaos in the city, perhaps by preying on criminals at first but then getting out of control. The Justice League has to figure out how to stop her without killing her. They discover she has a tragic backstory that led her to become a vampire, and they try to rehabilitate her.
Character design of the OC is crucial. Their appearance, abilities, and motives should be well - thought - out. Also, the reaction of the Justice League members to the OC is important. Will they be welcoming or suspicious? Another key element is the overall plot. It should be engaging and make sense within the Justice League's universe.
First, develop a unique OC (Original Character). Give them a distinct personality, backstory, and set of powers. For example, if your OC has the power of telepathy, think about how it will interact with the Justice League members. Then, plan the plot. Maybe your OC starts as an outsider who gradually earns the trust of the League. They could help solve a mystery that the League couldn't on their own.
Think about her powers and how they would be reflected in her design. If she has the ability to turn into a bat, she could have some bat - like features even in her human form, like small, pointed ears or a slightly more angular face. Her hair could be wild and unkempt, as if she's constantly on the move. And her shoes should be practical for running and sneaking around.
One idea could be an OC with the power to manipulate time joining the Justice League. They could accidentally create alternate timelines while trying to stop a villain, and the Justice League has to fix it. For example, the OC might go back in time to prevent a major disaster but end up changing the course of events in a way that makes the villain even more powerful in the new timeline.
One idea could be that the OC has a unique power that the Justice League initially distrusts but later comes to rely on. For example, the OC can manipulate time in small bursts, which at first seems dangerous but is actually crucial in stopping a villain who can freeze time.