Here's another idea. A new villain emerges who has the ability to manipulate the fabric of different dimensions. This villain targets Themiscyra and Gotham. Batman gets involved when he realizes that Gotham will be the next target after Themiscyra. He travels to Themiscyra to learn more about the villain's powers from the Amazons' ancient knowledge and then teams up with their best warriors to fight back.
A plot could involve Batman investigating a mystery that has ties to Themiscyra. For example, some ancient artifacts from Themiscyra are showing up in Gotham's black market. As he delves deeper, he discovers a connection to a long - lost Amazonian prophecy. Or perhaps there's a character from Themiscyra who has come to Gotham seeking Batman's help to save her homeland from an internal power struggle.
One idea could be Batman visiting Themiscyra for some reason, like seeking help from the Amazons in fighting a new and powerful villain in Gotham. Maybe he has to prove himself worthy to get their assistance.
One idea could be that Raven is in danger from a new dark magic threat and Batman, with his detective skills, helps her track down the source. They start to learn from each other, Raven about Batman's human tenacity and Batman about Raven's otherworldly powers.
One idea could be exploring Bruce Wayne's early training in more detail. Show his struggles and how he overcame them. For example, his first encounters with Ra's al Ghul's League of Shadows could be more in - depth, with new challenges and characters added.
One idea could be that Robin gets trapped in an alternate dimension where the villains are in control and Batman has to figure out a way to bring him back. Another could be a story where Batman is injured and Robin has to take on a major villain alone, learning to trust his own instincts more. Maybe a plot where they encounter a new, powerful ally who turns out to have a hidden agenda that threatens Gotham.
One idea could be that Batman and Supergirl team up to stop a powerful alien threat that is beyond the capabilities of either of them alone. They start off distrusting each other due to their different methods, but as they face challenges, they learn to work together and respect one another's skills.
One idea could be that the Witchblade somehow ends up in Gotham City. Batman initially suspects it to be a new weapon in the hands of some villain. But as he investigates, he discovers the unique power and origin of the Witchblade. Maybe the Witchblade chooses Batman as its wielder for a short time to fight against a powerful supernatural threat that Gotham has never faced before.
One idea could be a misunderstanding. Maybe a villain manipulates information to make Batman think Nightwing has turned bad. So, Batman starts to hunt Nightwing, while Nightwing is confused and has to prove his innocence.
A cool plot could be that a powerful alien race arrives on Earth and offers a deal to the world leaders. Batman is suspicious of their motives and starts investigating. Superman, on the other hand, is more open - minded at first. This causes a rift between them. As Batman uncovers more evidence of the aliens' true intentions, he has to convince Superman. In the end, they join forces to stop the aliens from taking over the Earth.
One idea could be a story where Batman and his dad work together to solve a mystery that has haunted the Wayne family for generations. They could use their combined intellect and skills to uncover secrets.
One plot idea could be them teaming up against a new and powerful villain that neither of them can defeat alone. They have to learn to trust and rely on each other's skills in a more in - depth way.