Here's how the team reunite with their parents and Snowdrop kills the Predator in Snowdrop's Grand Adventure: The Search for Primrose.
[Soon our heroes manage to get to the top with the branch]
[Then there was footsteps and a shadow approaching]
Skyla: This is it! It's! It's! It's! Its....
[we see that it's the Mane 6, The engines, Brian, the Eeveelutions, Zecora, Green Bills, and the royals]
Skyla: Thomas, the others, and our parents?
Yuna: Mama! Papa!
Skyla: Mommy! Daddy!
Zeñorita: Mamá! Papi!
Apple Bloom: Applejack!
Sweetie Belle: Rarity!
Scootaloo: Rainbow Dash!
Eevee: Mom! Brian!
[They all hug their parents]
Princess Luna: Thank godness you're safe!
Brian: Are we glad to see you all are safe!
Sylveon: I was so worried.
Applejack: Where have y'all been. We done been searchin' fer' ya everywher'.
Fishlegs: We've out searching for Snowdrop's Mother.
???: You didn't had to find me.
[then Primrose' spirit appears]
Hiccup: Miss Primrose!
Yuna: Where were you?
Primrose: I was at the desk.
Astrid: That, Gobber!
Human Rainbow: What desk?!
Snoutlout: Yeah! Your letter said that you were going to Doom! [takes out the letter]
Primrose: No, it said: "Dear Snowdrop I'm not going to be here tomorrow. Because I have a meeting at Desk, I will be back at the after noon. Signed, Primrose".
Astrid: We came all this way for nothing?!
Hiccup: Afraid so.
Primrose: [looks around] Wait, where is Snowdrop?
Astrid: [gasps] Oh, Mss Primrose. I ddon't know how to tell you this, but, the Cloggersaurus got her.
Primrose: The what?
Skyla: Here it comes!
[But it shows it was Rexy!]
Rexy: Hi, little ones.
Blythe: Rexy, what are you doing here?
Rexy: I was looking for you.
[Our heroes watch as Rexy is growling at Blythe]
Yuna: Sometimes, I wonder what that T-Rex is saying.
Sunil Nevla: Did you see the Cloggersaurus?
Rexy: The Clogger-what-now?
Pepper Clark: The Cloggersaurus! It's nasty, and it did horrible growling sounds.
Rexy: [chuckles] No, Pepper. That was me calling for you.
Zoe Trent: Wait, you did the growling sounds?
Zoe Trent: [faints in surprise]
[We go back with Snowdrop]
Snowdrop: Help! Someone get me out of here!
[But she hears Rexy's growling]
Snowdrop: Or maybe 2!
[she backs up but then bumps into something]
Snowdrop: Huh? [looks back and uses Force vision to see it's the predator!] [gasps] THE INVISIBLE MAN!!!!! [she starts sliding back] AAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHH!!!!!!!!!!! [bumps against a crystal]
[the Predator then deploys it's bladed knuckles]
Snowdrop: [takes out a Colt Detective Special Revolver and fires at the Predator]
[But the Predator blocks the bullets with his wrist blades]
Snowdrop: Uh, oh.
[Then the Predator starts slowly he begins to take his mask off, which reveals he's an alien!]
Snowdrop: You are one ungly alien.
Snowdrop: [continues shootiung at the Predator till her gun outs out of ammo] Bad idea.
Predator: [slaps her]
[she then uses Force vision to the Predator who then takes a out a stick. Which is a electro staff!]
Snowdrop: [uses her force vision] An electro staff!
[she then draws and activates her own custom lightsaber with a snow white colored blade]
[Soonthe 2 charge and they begun to clash!]
[the clash echoes around the cave]
Nightstar: [her ears lift up and she looks to the side]
Yuna: That's Snowdrop! She's still alive!
Primrose: Hurry! Get her out of there!
Yuna: Right away!
[the riders hop on their dragons and follow the sound]
[back with Snowdrop and the Predator. The 2 kept clashing]
[but then she shocked her]
Predator: [kicks her]
[then the Predator is about to kill her, when suddenly..]
Nightstar: [roars as she fires a plasma blast at the Predator]
Snowdrop: [deploys her lightsaber]
[Snowdrop then jumps in the air]
[Soon the saber is impaled to the Predator's heart and he dies]