Disclaimer: I own nothing that has to do with Gravity Falls or any other cartoon shows.
Same Night: Roxxon Norco
Outside: Loading Area
Dipper, Mabel, and Jazz sneakily and silently jump on a dock after getting off the boat without being seen. They run towards a ladder to the road.
Mabel grabbed the ladder and was about to climb but ducked down as a worker drove by and men shouted indistinctly. Mabel then climbs up the ladder quietly. Jazz then climbs up with Dipper following her.
All were staying low. Jazz and Dipper follow Mabel, who takes out her gun, ready to shoot if needed. She keeps it pointing down.
Mabel looks back to see Dipper climb off the ladder. Mabel tells them, "Come on." They speed-walk quietly over to a large construction garbage bin. Dipper holding his own gun, Jazz unarmed but safer by staying with either of them. They reach the bin, their back towards it, hiding. Mabel looks at the two, "You're not gonna freak out on me, right?"
They slowly move forward, Mabel leading with her gun raised. Dipper answers, "I hope not." Mabel stops and looks at Jazz.
Jazz looks between Mabel and Dipper. Seeing them both looking at her, she answers, "No promises." She's trying to stay calm but freaking out inside.
Barrels Loading Area
They get closer to the main building where Pacifica is. Mabel quickly pushes herself up to the next level area, where crates are loaded with barrels. Jazz follows suit, quickly and gracefully pushing herself up with Dipper behind her. They go up to a large container.
Mabel pokes her head out, looking around, then up to see the President in the Iron Woman suit, strung up by her wrists. Mabel narrows her eyes, muttering, "Oh my God." Mabel hides from view. Leaning her back against the container, she sighs. Jazz and Dipper looking at her, "He's strung up over the oil tanker. They're going to light him up, bro."
Dipper thinks and says, "Viking funeral. Public execution."
Jazz looks at Dipper pointedly, "Yeah, death by oil."
After a moment, they stay low, running across the road, Mabel grabbing the railings as she runs up the stairs with Jazz and Dipper following.
An announcer on PA says, "Broadcast will begin shortly. Take final positions."
Inside: Main Building
Control Room
Bill leans down beside a tech girl, looking at the screen, showing the President, "Okay. That's good." He stands straight, pointing at the screen, "Now give me cameras A through E, and we'll do a full tech rehearsal." Another screen shows 4 cameras, 1st shows a down view of the President, 2nd shows the same view as the first but much further away, 3rd shows a bird's-eye view of the President, 4th shows The Mandarin's symbol. The technician typing, following Bill's orders.
Outside: Catwalk
Mabel, Jazz, and Dipper cautiously and quietly walk on the catwalk. Mabel, with her gun raised, asks Dipper behind Jazz, "Is your gun up?"
Dipper quickly raises his gun before answering Mabel, "Yep. What should I do?"
Mabel instructs quickly, "Stay on my six, cover high, and don't shoot Jazz or me in the back."
Dipper repeats, "Six, high, back. All right." Suddenly, they're being attacked by gunfire, the bullets hitting the railing beside them. Mabel and Jazz flinch. Dipper quickly raises his gun and shoots at man 1 on the balcony on the other side by the light. Mabel ducks a bit, grabs Jazz's left hand and starts running as she covers her head. Dipper then shoots again, hitting the light glass cover but not the actual light. Mabel drags Jazz down for cover, following the walkway, and ducks down, hiding behind an electrical-looking box. Dipper shoots again before lowering down, hiding with his arm raised and his gun pointed up. Dipper says smugly, "You see that? Nailed it." Jazz practically against the two as it's a small box, Dipper with his protective arm over in front of her as she breathes heavily.
Mabel looks at Dipper, saying sarcastically, "Yeah, you really killed the glass."
Dipper narrows his eyes, saying in disbelief, "You think I was aiming for the bulb? You can't hit a bulb at this distance." Mabel quickly stands and shoots one shot, successfully taking the light out.
Mabel lowers back down, giving Dipper a look. Jazz gives Mabel a surprised look as an announcer on PA says, "All personnel, we have hostiles on east unit 12."
2 men run with their guns raised, and one man shouts, "Over there!"
The announcer on the PA says, "I repeat, hostiles on east unit 12."
Dipper checks his gun, "I'm out. Give me... Give me..." He looks at Mabel, "You got extra magazines?"
Mabel rolls her eyes, "They're not universal, Dipper."
Dipper points at himself, "I know what I'm doing. I make this stuff. Give me another one." He looks down, "One of yours."
Mabel rolls her eyes in annoyance, "I don't have one that fits that gun."
Dipper argues, "You've got five of them." He shifts over, so he's in front of Jazz. He says, "Here's what I'm going to do. Save my spot, ready?" He quickly stands before lowering down, not even a second later.
Jazz asks Dipper, "What'd you see?"
Dipper tells Jazz truthfully, "Too fast. Nothing." He prepares himself again, "Here we go." He clears his throat as he stands up again, popping his head above the box to see 4 people jump off one railing to land on another. Dipper lowers back down, "Three guys, one girl, all armed." The three men and one woman continue to jump down onto a yellow container, with the woman looking up with a stern expression as the EXTREMIS runs up her arms and cheeks.
Mabel stands up, raising her gun, aiming as both Dipper and Jazz pop their heads up to see more men and women aim their guns in their direction with the EXTREMIS running through their veins, eyes glowing orange.
Mabel says to Dipper as they all stand straight, looking around them, "God, I would kill for some armor right now."
Dipper agrees, "You're right. We need backup."
Mabel tells Dipper, "Yeah, a bunch." Another EXTREMIS soldier aims his gun at the three on a balcony above.
Dipper looks out in the distance, "You know what?" The two look at him questionably. He nods in the direction he's staring at, making Mabel and Jazz turn their heads at the same time. A light in the distance is getting closer, making a whooshing sound.
Jazz asks Dipper on her right in disbelief, "Is that..." She trails off as the light breaks in two.
Dipper answers, "Yep."
Mabel then asks, "Are those..."
Dipper answers, looking proud, "Yeah."
The two lights reveal to be two Iron Man suits, followed by more. The suits line up in a circle, hovering all around the area.
Inside: Another Room
Wendy is in a different room. She's sitting in a chair with two guards near her, staring at the floor. She narrows her eyes as she listens and turns her head to look outside to see Dipper's suits that they have been working on for the past 6 months; she smiles knowingly and happily.
Outside: Catwalk / Sky
Jazz stares at the Iron Man suits in awe. Dipper pats Mabel's back, who stares at all the suits in shock. Dipper tells Mabel, "Merry Christmas, sis."
All the suits finish lining up.
All EXTREMIS soldiers that are around the site look up at the suits with the EXTREMIS glowing in their veins.
Dipper instructs JARVIS, "Jarvis, target EXTREMIS heat signatures. Disabled with extreme prejudice."
JARVIS's voice obeys through the armor, "Yes, sir." All the suits scan and see all the soldiers with the EXTREMIS heat in their bodies.
Dipper steps forward, "What are you waiting for? It's Christmas." He quickly does the religious cross sign as to pray and holds his arms up, "Take them to church."
A silver and blue Iron Man suit immediately punches EXTREMIS woman 1 off the railing, making her scream as she falls, then blasts at EXTREMIS man 1 before blocking EXTREMIS man 2's hit.
A silver Iron Man suit flies and hovers across 4 EXTREMIS men. JARVIS's voice says, "Gentlemen." He spins, breaking apart to hit EXTREMIS men 4, 5, 6, and 7 off the catwalk before reattaching himself and flying away.
The 3 EXTREMIS men grab hold of the silver and blue Iron Man suit at the same time. EXTREMIS man 3 rips off the helmet, and EXTREMIS man 1 rip off the left arm before JARVIS takes off and takes EXTREMIS man 2 with him.
Dipper warns as the silver and blue Iron Man suit flies down, "Incoming!" Dipper grabs Jazz and moves out of the way as the silver and blue Iron Man suit flies all the way down, taking EXTREMIS man 2 and crashing into a metal column that's holding up the metal-building structure, making it wobble.
Mabel grabs hold of the railing, Dipper still holding Jazz. Both grab the railing as Dipper demands, "Jarvis, get Igor to steady this thing."
A big Iron Man suit runs, taking out large, heavy containers before going underneath the breaking metal column. He hits the broken stand. Mechanisms whirring as a large pole comes out, pushing up the structure before the suit stands straight, holding the building structure up.
Mabel kneels and looks at Dipper, asking in amusement, "So, this is how you and Wendy have been managing your downtime, huh?"
Dipper nods, "Everybody needs a hobby." Jazz holds onto the railing and looks out in awe to see all the suits fighting the EXTREMIS soldiers. Dipper sees and points out, "Heartbreaker, help Red Snapper out, will you?"
The Iron Man suit called 'Heartbreaker' flies over to an Iron Man suit called 'Red Snapper' that has 3 EXTREMIS soldiers on it. Heartbreaker blasts with its chest repulsor at EXTREMIS man 8 off of Red Snapper's left arm and flies closer only to be tackled by EXTREMIS woman 2 that was on Red Snapper's back.
EXTREMIS man 9 rips off the facial slit of Red Snapper, making it fly into a craned load of oiled barrels, making the barrels, the suit, and EXTREMIS man 9 cause a big explosion, causing some barrels to fly in different directions.
Inside: Main Room
One of the barrels explodes at the entrance of the main room, causing a still-strapped Pacifica to gasp as she's pushed and flown roughly aside. Bill gets pushed back to the wall behind him, roughly hitting his head.
Inside: Another Room
Wendy hears the explosion and gasps. The guards turn their heads to the room's entrance before another barrel hits it.
(Slow Motion) Wendy quickly jumps out of her chair as the explosion takes over and pushes out the guards. Wendy lands on her right side, sliding a bit as she covers her head (Slow Motion Over).
Outside: Catwalk
The building structure is on fire as many pieces fall. Dipper quickly stands as a suit lands in front of him. Dipper turns as the suit opens and closes around him.
Dipper compliments JARVIS, "Nice timing." He points at Jazz, "Get her to safety."
Jazz stands up, narrowing her eyes in confusion, "Wha-" Suddenly, an Iron Man suit appears and latches onto her, quickly flying away.
Mabel smiles as she stands, putting her gun in her waistband behind her pants, "Oh, yeah. That's awesome. Give me a suit, okay?" Dipper looks at her. Mabel holds her arms out, ready to take a suit.
Dipper shakes his head a bit, "Oh, I'm sorry, they're only coded for me."
Mabel frowns and narrows her eyes in confusion, "What does that mean? You just-" She points in the direction where Jazz flew off too.
Dipper interrupts, "I got you covered." The facial slit drops, and Dipper quickly flies off, leaving a confused and mad Mabel watching him fly off.