One possible plot could be that Tony Stark is reborn with some of his memories intact. He tries to find a place for himself in the DC Universe. He might be initially distrusted by the heroes because of his different origin. But as he proves his worth by helping against threats like Darkseid or Lex Luthor's latest scheme, he gradually becomes an accepted and important part of the DC world. His genius could lead to new ways of dealing with meta - human powers, like creating tech that can nullify or enhance them in a controlled way.
Well, maybe he could use his tech knowledge to collaborate with Batman on some super-advanced gadgets. He might introduce new armor designs that would be a game - changer in the DC world.
Perhaps he'd start off as an unknown in the DC Universe and slowly make his mark. He could find himself in the middle of a battle between the Justice League and some powerful villain, and use his quick thinking and technology to turn the tide. His Stark Industries - like company in the DC world could also create some ethical and technological debates among the DC characters.
He might become more cautious. In the DC Universe, there are a lot of powerful and unpredictable entities. So, he could tone down his cocky side a bit.
The plot could involve the original character (oc) being reborn in the DC Universe with new powers. Maybe they are reborn as a metahuman in Gotham and have to navigate the city's crime - filled streets while dealing with their newfound abilities and trying to figure out their place in this new world.
One possible plot could be that Tony Stark, while on a solo space exploration mission, stumbles upon the Ravagers. He initially has a tense encounter with them as they are skeptical of his motives. But then, they realize his tech can be useful. They team up to take on a common enemy, a powerful alien warlord who has been raiding planets for resources. Tony modifies some of his Iron Man tech with Ravager tech he discovers, creating a new and more powerful suit.
Well, perhaps the plot could start with Tony Stark coming across some ancient Norse texts about Jormungand while researching something completely unrelated. He then becomes obsessed with learning more about the Midgard Serpent. He might try to create a tech - based model of Jormungand to study its capabilities. As he delves deeper, he discovers some secrets about Norse magic that could potentially be applied to his technology, leading to a whole new level of Iron Man upgrades.
In this fanfiction, the plot might be centered around Tony's journey of self - discovery as a Greek demigod. He could start having strange dreams or visions related to Greek mythology. As he investigates, he realizes his true heritage. Along the way, he might have to choose between his life as a superhero in the public eye and his new life as a demigod, which has its own set of rules and responsibilities that he has to learn and abide by.
The plot could revolve around Tony Stark's discovery that the mutant registration act is being misused by some powerful and corrupt individuals. He decides to take matters into his own hands and starts investigating. As he digs deeper, he uncovers a conspiracy that not only endangers mutants but also the entire world. With the help of some mutant friends he has made along the way, he uses his intellect and resources to expose the conspiracy and bring about a new era of mutant - human relations, where registration is no longer a tool for oppression.
One possible plot could be that the female Tony Stark and Rhodey are working together on a new high - tech project. They face challenges like a shortage of resources or a rival trying to steal their ideas, and they have to use their combined intelligence and friendship to overcome these obstacles.
Maybe in a fanfiction, there is a cursed ballet. Tony Stark and Loki are both drawn to it for different reasons. Tony because of his love for all things unique and Loki because he senses dark magic. They have to team up to break the curse. During this process, Loki has to use his ballet skills (which he has been hiding) and Tony uses his tech to figure out the source of the magic. As they work together, they form an unlikely bond.
Well, perhaps the plot could involve Tony Stark's quest to collect all the Infinity Stones for some noble purpose. Maybe he wants to use their power to prevent a greater threat to the universe than Thanos ever was.
One possible plot could be Tony Stark being placed in foster care after some kind of family crisis, like his parents' sudden death. He might use his genius even in the foster home to build small gadgets, and at the same time, he could face challenges like bullies or unkind foster siblings. But he'd also find some friends who believe in his potential.