Well, Black Adam's powers came from a combination of ancient magic and a specific ritual. This gave him extraordinary abilities like super strength and flight.
Their powers could combine in a really cool way. Naruto's ability to control chakra could be used to direct Black Adam's magic in a more precise way. For instance, if Black Adam were to shoot out a blast of magic, Naruto could use his chakra control to shape it into a more effective attack, like a concentrated beam.
At first, the OC would likely be overwhelmed. Black Adam's powers are extremely potent. They might accidentally cause destruction while trying to figure out how to control their new strength. For instance, just a simple jump could send them flying into a building.
Well, there are fanfictions where Spiderman gets his powers not from a single spider bite. Instead, he could be exposed to a series of bio - engineered substances that are spider - related. These substances interact with his DNA over time, gradually endowing him with the spider - like abilities we know, such as super strength, agility, and the ability to cling to walls.
Kraven's powers come from a mix of factors. He experiments on himself with special serums and constantly challenges himself in the wilderness to develop superhuman abilities like superior reflexes and acute perception.
Deadpool got his powers through a messed-up experiment. His body was subjected to a procedure that gave him superhuman abilities, but also left him scarred and crazy.