Chapter 1
Deep underground, in an abandoned mineshaft, a xenomorph hive was being formed under the leadership of three Queens and a mighty Empress. One was a PredQueen, possessing the characteristics of a Predator, with a highly exaggerated physique, having emerged from a captive predator named Niadra. One was an experiment from the Seattle facility, being a human-xenomorph hybrid possessing a womb to give birth to Newborns named Izsha. The final one was a second in command Queen to the Empress named Zagara. Finally, the Empress was none other than Mabel Pines, having switched bodies with the true Empress. She held a meeting with her three Queens.
Empress Mabel: My associates. The time has come. We have remained hidden far too long. We require more children, and we must go to the surface to find them.
Niadra: Let me lead them, Mabel. I will help them crush them.
Mabel: No. I will go up myself. I'm looking for specific people, not just anyone.
Izsha: Who do you want, Mabel?
Mabel: Some people I knew when I was a human. I'll find them myself. Zagara, prepare a group of warriors for me.
Ziagra: Yes, Mabel.
On the surface, the people of Gravity Falls, who had escaped the explosion, were living all over the country. Mabel's old friends, Grenda and Candy, we're having a sleepover at Grenda's new house.
Grenda: I wish Mabel was here right now. The party's always made with her here.
Candy: Indeed. I hope she was able to escape the explosion.
They heard a rumbling downstairs.
Grenda: Oh man. Did mom get mad again?
They walked downstairs, and found Grenda's parents on the floor with holes in their heads.
Grenda: Mom! Dad! No!
Candy: What has happened to them?
A xenomorph warrior jumped in front of them, hissing at them.
Candy: Candy, attack!
Candy charged the xenomorph, only to be pinned to the wall by the tail of the creature.
Grenda: You let her go!
She charged the warrior from the other side, only to be grabbed by the throat of the monster. It dropped Candy, picked her up with its other hand, and dragged the both of them away.
In another part of the country, Pacifica Northwest was living in a stately mansion with her family. She was lounging by the pool, drinking Iced Tea, when she heard a deep hiss.
Pacifica: Hello? Who's there?
Then, something stood over her, grabbed her, covered her mouth, and dragged her away.
In the ocean, Mermando was swimming around, when he saw the most unusual sea creature.
Mermando: What is that thing? I've never seen it before.
He slowly approached the jet black creature, when it grabbed him and swam away, pulling him by his tail.
Mermando: Unhand me, monster!
The creature ignored him as it swam him away.
Meanwhile, the Pines were living in Dipper's parents' house. One of them flicked on the TV, and already saw something terrible.
Reporter: Crime wave sweeps the nation. Two adults were found dead in their house, and two kids missing. Also, Pacifica Northwest is missing. Police sketch artist H.R. Giger questioned witnesses, and the assailant is suspected to look like this.
The TV showed a picture of Giger's first sketch for the xenomorph.
Dipper: This can't be a coincidence. It's Mabel. It has to be Mabel.
Stan: It makes sense, but where do we find them?
Sarah: They just dug underground, and dissapeared. They could be anywhere by now.
Dipper: All the kidnappings happened in America, so it has to be in America.
Soos: Yeah, but its been like 6 days. Who knows how powerful she is?
Wendy: Relax, Soos. She's probably just the same as when we left her.