One possible storyline could be that Goku Black arrives on Earth in search of a powerful energy source. The Justice League detects his arrival and confronts him. At first, they underestimate his power. Goku Black easily defeats some of the members, but then the League starts to work together and figure out his weaknesses. Another storyline could be that an evil entity has brought Goku Black to the DC Universe to cause chaos and the Justice League has to stop him while also dealing with the entity. Or perhaps Goku Black is tricked into thinking the Justice League are enemies of the Saiyans and he attacks them, only to later find out the truth and have to team up with them to fight a greater threat.
A storyline could involve Goku Black being sent to the DC Universe by Zamasu as part of a plan to conquer new worlds. The Justice League initially tries to reason with him, but he attacks. Superman and Goku Black have an epic battle in the skies, with their powers causing massive destruction. Meanwhile, Batman is researching a way to stop Goku Black's ki attacks. Wonder Woman joins the fight, using her lasso to try and restrain him. As the battle progresses, the Flash realizes that Goku Black's power has a pattern and he tries to disrupt it. In the end, they either defeat Goku Black or find a way to send him back to his own universe. There could also be a story where Goku Black teams up with Lex Luthor who promises to help him defeat the Saiyans in exchange for Goku Black helping him take over the world.
In a fanfiction, the story could start with Goku Black sensing the powerful energy of the Green Lantern Corps. He travels to their sector to test his strength against them. The Justice League is called in to assist. Goku Black quickly shows his dominance in combat, but the League's unity starts to give him trouble. Aquaman uses his control over the sea to try and slow Goku Black down. Cyborg analyzes Goku Black's power and tries to find a technological way to counter it. As the story unfolds, the heroes start to learn more about Goku Black's motives. It could end with a final showdown where the Justice League uses a combined attack of all their powers to either defeat Goku Black or, in a more interesting twist, convince him to change his ways and use his power for good in the DC Universe.
Chapter 217 is the strongest chapter-level answer because it starts from But Director Sun didn't plan to give her any room to think, he directly... and follows through on Although her initial performance was mediocre, fortunately, Jiang Li....
The best chapter pointer here is Chapter 290, "The Jiang Family is to be Destroyed". It opens with It was nearly evening when Jiang Li checked into Beijing Hospital. and closes on However, just as they were slandering and framing her, Jiang Li's Weibo....
Look to Chapter 269 for the clearest answer. It begins with The next morning, Shen Lan's personal account posted a Weibo., keeps building through [Shen Lan V: Thanks everyone for your concern about our show., and lands on At that time, people guessed it was Shen Lan, and there were even photos....
Look to Chapter 282 for the clearest answer. It begins with The other villagers quickly heard the commotion and hurried over., keeps building through By the time the village chief was alerted and ran over with others, the..., and lands on Why isn't there a live broadcast reporting on their.
Look to Chapter 216 for the clearest answer. It begins with The production team also took advantage of the situation to start an..., keeps building through The enthusiasm has not dwindled over time., and lands on However, the next second, He Yun, who had hardly ever spoken to him,....
If you want the clearest chapter reference, go to Chapter 249. Early on, Jiang Yan's body subconsciously shivered twice.; later, the chapter leans on Jiang, Jiang Li, why have you come back?" Jiang Li's icy gaze shifted away....
A practical answer is Chapter 252, because it turns the idea into a concrete scene. The chapter opens with In fact, Jiang Yan's shirtless appearance this time was entirely Jiang..., adds pressure through They are all sitting in front of the screen watching you now." Jiang Li..., and ends on Aren't.
Chapter 275 is the strongest chapter-level answer because it starts from Hu Zi was exceptionally cooperative, and within half an hour, all the... and follows through on Since you two are considering the village, let's use this money to repair....
A practical answer is Chapter 262, because it turns the idea into a concrete scene. The chapter opens with Wen Jiaojiao couldn't stand it anymore and immediately logged onto her..., adds pressure through Just then, the Southwest Wildlife Protection Association along with the..., and ends on Your.