Senku and Xeno will begin their moon mission in Dr. Stone Chapter 199. Amidst everything that has happened, will these two succeed and get along after the medusa tower incident?

Dr. Stone Chapter 199 spoilers have dropped and it teases a major character's return. Who could it be?

Warning: The following content is full of spoilers. Read at your own risk.

Senku revived Xeno to tag him along to the moon to ask Whyman about his plans to repeatedly petrify people on Earth. The Science genius knows that when they get NASA scientists on his side, they will be an "invaluable asset."

According to Epic Dope, there is no way Xeno will refuse Senku's offer, knowing he has no other options left. He, too, knows who Whyman is and where they can find him.

So, despite his tense relationship with Senku, he agrees to cooperate to solve the mystery about Whyman. They plan to build a spaceship that will bring them to the moon and begin by collecting superalloys, rubber, oil, fuel and other raw materials.

Meanwhile, a Reddit user reveals Dr. Stone Chapter 199 summary, beginning with the return of fake Stan's sister. Kinniku's sister will be resurrected with the number 75, which may mean she is the 75th person.

Fans will then see the government-made City of Superalloy. Unfortunately, they can't harvest iron here, so they will use Perseus' iron instead to make other metals power up Perseus.

However, it will crash into the ocean that will pretty much destroy it. The manga will end with a number of mob characters dancing in the City of Superalloy.

In Dr. Stone Chapter 198, Senku went to Xeno's statue after he took the 17th dose. Chrome asked Senku if he were sure of his decision, to which Tsukasa explained they would have no problem knowing Stanley was not around.

Senku then revived Xeno and told him the world's rules had dramatically changed 10 billion times, OtakuKart News. Instead of thanking Senku, Xeno told him he had violated the natural order with nefarious Science.

Chrome questioned Xeno and stressed everything worked out fine. Tsukasa pulled Chrome and told him it was the worst part of Science he had ever seen. Senku then began a square off with Xeno, talking about Science and starting a Science battle.

What happens next can be seen when Dr. Stone Chapter 199 drops on Sunday, June 6. It can be seen on Viz Media and Shueisha's Manga.