Another plot could involve the Avengers being transported to an alternate universe where the concept of justice is completely warped. They have to adapt to this new world while also trying to restore a sense of true justice. For example, in this universe, villains might be in charge of making the laws. The Avengers would need to find allies and figure out how to overthrow this unjust regime.
One idea could be the Avengers facing off against a new, unjust system within their own superhero community. Maybe some heroes are being wrongly persecuted due to false accusations of using their powers for personal gain. This would create a lot of internal conflict as they try to clear their names and fight against the system.
One idea could be exploring Batman's internal struggle in the Injustice universe more deeply. Maybe he has a nightmare where he becomes like the tyrannical Superman, and this makes him question his own actions and methods even more.
A story about an OC who is a healer in the Injustice 2 world could be really engaging. In a world full of battles and destruction, this OC could be trying to heal not only the physical wounds but also the emotional and psychological damage that the characters have endured. They might face challenges like being kidnapped by villains who want to use their healing powers for their own evil purposes.
One idea could be exploring an alternate ending where the heroes and villains form an uneasy truce much earlier. This would change the power dynamics in the Injustice universe significantly. Another idea is to focus on a minor character's perspective during the major events, like a civilian caught in the crossfire.
One idea could be that Batman tries to train Supergirl to better control her powers in the context of the Injustice 2 universe. He might see her as a potential force for good against the tyrannical regime. Another could be that Supergirl discovers a way to bring back the more heroic Superman she once knew, and Batman has to decide whether to trust her plan or not.
One idea could be exploring an alternate universe where Terry McGinnis (Batman Beyond) is pulled into the Injustice universe and has to deal with the morally compromised heroes. He might try to find a way to bring back the true sense of justice among them. For example, he could start by trying to reason with Superman, showing him the error of his ways through his own experiences in his own universe.
One idea could be that Batman and Wonder Woman have a major disagreement over how to deal with the Injustice regime. Batman wants to use more stealth and subterfuge while Wonder Woman believes in a more direct approach. This could lead to some intense battles between them, not physical but more of a battle of wits and ideologies.
One plot idea could be Batman trying to convince Wonder Woman to see the error of her ways in the Injustice universe. Maybe he shows her the long - term consequences of their actions on the common people. Another could be a story where Wonder Woman and Batman have to team up against a greater threat that makes them re - evaluate their stances in the Injustice conflict.
The OC could be an alien with a different kind of power set that is a threat to Superman. However, instead of fighting, the OC tries to reason with Superman. They show him the consequences of his actions through their own experiences on their home planet where a similar situation occurred, which might make Superman re - evaluate his path.
One idea could be exploring what would happen if a hero from the Marvel universe was wrongly accused of a crime in the Injustice world. For example, Spider - Man being framed for a mass destruction event. Another could be a story about how the X - Men would deal with the unjust laws in the Injustice setting. Maybe they would form an alliance with some of the Injustice heroes to fight for mutant rights within that corrupted system.
How about a crossover with the 'Watchmen' universe? The complex and morally - gray characters from 'Watchmen' would fit well into the 'Injustice' world. Rorschach's unwavering sense of justice, no matter how extreme, could either clash or find common ground with the characters in 'Injustice'. It would be a great exploration of different concepts of right and wrong in a superhero - filled world.