I might steal and/or mess up various other plans, but here's a bit. I didn't quite go with the idea of them all on the dutchman, but I wanted to make sure all the main characters got their moment.
Jack rushes onto the deck, eager to find Beckett and kill him. He is confronted almost at once by Elizabeth.
Elizabeth: Jack!
Jack throws his arms around her.
Jack: Elizabeth! Thank goodness you're alive. Where be Barbossa?
Elizabeth: Back in the locker, where he belongs.
Jack: You killed him?
Elizabeth: (grins) I've killed my share of famous pirates.
Jack: Well I guess I'd better do Beckett in... even the score between us, maybe.
Elizabeth: Not if I find him first!
The two grin at each other and run towards the helm of Beckett's ship...
MEANWHILE, Will is still manuevering the Pearl through the battle. The mer-people are climbing the masts of the EITC ships, tearing down whatever they can, but the evil mer-people (Beckett's inventions) have arrived and countered their attack. A storm is gathering overhead, and the waters are crashing around the ships.
Anamaria has found Bootstrap again, who is poised to stab the heart.
Anamaria: No! Will has fought too hard to free you from that ship!
Bootstrap: But only an immortal captain who could control the ocean would be able to provide a decisive victory!
Anamaria: Things aren't so desperate...
Well, actually they are. It's head to head; the pirates are fierce, but the EITC are more numerous. Bootstrap pulls out a knife...
MEANWHILE,
Jack and Elizabeth see Beckett ahead. Slow mo shot of them facing each other down and drawing swords as dramatic music swells. It's definately going to be a swordfight for the ages, and who'd have thought the short dude would have so much skill? Jack and Elizabeth attack at the same time, and Beckett defends with strength.
Jack: (as they fight) Elizabeth, stand back, he's mine!
Elizabeth: Jack, we don't have time for that! If he's yours, then kill him!
Beckett: You really think you can win, Sparrow? I've marked you once and I'll do it again. Pirates have no place in this world.
Elizabeth: And who does? Men in wigs and women in corsets, playing pretend while things go to hell?
Beckett: Certainly not women like you, Ms. Swann.
Elizabeth: Women like me?
Beckett: Traitors and seducers and harlots---
Elizabeth: You forget to mention damn fine swordswomen.
Beckett: ---Who don't know their place anymore.
Elizabeth: My place...?
Jack and Elizabeth have manuevered Beckett to the mast of his ship, and in a very swift motion, Elizabeth tosses Jack her sword, and pushes Beckett up against the mast with an unexpected and almost brutal kiss. She's chained him, and before Beckett can react, Jack drives both swords into him.
Elizabeth: My place is right here. Between you and Jack.
Beckett: (in a choking voice) This isn't the end of my empire.
Jack: (with a dangerous grin) But it's the end for you, Beckett. We'll tackle that empire some other day.
Beckett slumps and dies. Jack and Elizabeth stand panting in the midst of the still chaotic scene.
MEANWHILE: On the Black Pearl...
Bootstrap is about to stab the heart, but suddenly a slew of evil mer-people hiss their way on board. Bootstrap and Anamaria whip out weapons and begin attacking them, which isn't easy due to their fast movements. Bootstrap kills two and Anamaria beheads one, when suddenly the queen of the evil karcharika (sp?) crawls on board herself in a murderous rage. Boostrap and Anamaria step back and glance at each other in fear, but go in for the attack.
It's a brutal fight to say the least. The queen swiftly knocks Bootstrap against a wall and he struggles to stand. Anamaria wields her blade with skill against the beast, but she's just unevenly matched. Though she deals some nasty wounds to the queen, Anamaria begins to weaken. Bootstrap manages to get the heart back in front of him and prepares to stab it...
From the helm, Will suddenly sees what's going on. In a panic, he rushes towards them...
Suddenly the karcharika queen, now bloody and angry, leaps forward and stabs Anamaria through the heart, reclaiming her sword and then diving back into the water. Will screams in horror, arriving just in time to catch her limp body. Without thinking twice, Will seizes the heart from his father, draws out his knife, and stabs it.
MEANWHILE, back on the DUTCHMAN,
Jack has taken the helm and is greatly enjoying firing on other EITC ships, who are getting really confused. Elizabeth has killed the other crewmates, and is actively searching among the ships for James.
She looks towards the black pearl at just the right moment to see Will stab the heart.
Elizabeth: (screaming) Will! No!
He's already done it. Suddenly, that evil karcharika queen emerges from the water yet again, just in front of Elizabeth. Elizabeth takes a step back and automatically reaches for her sword.
Evil Queen: (in a hissing voice) I have sssssomething for you....
Elizabeth draws back as the queen slings James' limp body onto the deck. Elizabeth steadies herself and rushes forward with her weapon. The queen is ready with a weapon of her own, and for a moment they battle it out. Finally Elizabeth yanks out the necklace that is meant to summon the queen and dangles it in front of her.
Evil queen: (in anger) Where did you get that?
Elizabeth throws the necklace to the deck of the ship and the evil queen makes for it, diving back into the water with her prize. Elizabeth thinks no more of her--- she rushes to James' body, lifting him up in her arms, nearly sobbing as she tries to revive him...
MEANWHILE....
Will is suddenly caught up in huge waves which emerge from the water, surrounding him. Davy's heart has vanished, and the storm centers around Will.
Bootstrap looks at the scene in horror, standing over now-dead Anamaria
From various positions around the area, Jack, Elizabeth, Teague, Bootstrap, and the rest of the crew look up at the intensity of the storm, as Will suddenly emerges, a dark shadow seemingly over his form. His voice echoes through the wind of the storm...
Will: I claim captainage of the Flying Dutchman and as keeper of the locker, I release Anamaria.
He kneels by her and places his hand, already the faintest tinge of blue, to the wound on her heart. The wound closes, and she flutters her eyes. Will stands quickly, not wanting her to see what he's done. He turns and looks on the rest of the battle.
Will: Now, time to even the score here...
The storm begins to pick up, as Will takes control of the water and begins to overpower various EITC ships.
MEANWHILE, on the dutchman...
Jack rushes over to Elizabeth, still holding the cold James.
Jack: God almighty. What has Will done?
Suddenly, James old ship swings alongside the Dutchman. Theodore, James' previous first mate, shouts over.
Theodore: We'll all be killed! Not all of these men deserve to die. Let us make a truce with you!
Jack: A truce with the East India Trading Company?
Elizabeth: Jack... Beckett's dead. They aren't all evil.
Jack: They've been avidly seeking to kill us, or need I remind you?
Elizabeth: They were being ruled by a corrupt man. We can lessen the destruction of this day now!
Jack: (shouting back to Theodore) Only if you promise never to attack any pirate again as long as you live, and your men with you!
Theodore: That can be arranged!
Jack: Then we have an accord!
Jack swings the wheel of the Dutchman towards Will, who is already moving across the water to take possession of his new ship.
Jack: What say you give him the news, eh love?
Elizabeth leans down to brush a kiss on James' lips, and leaves him laying on the deck as she steps forward to meet Will. His face is set, as he glances back aboard the Pearl, where Anamaria has awoken, alive and well. Amidst all the chaos, Elizabeth runs to him and hugs him sorrowfully.
Elizabeth: Will... you didn't have to...
Will: It's alright. It was the only way.
Elizabeth: We've made an agreement with the new leader of the East India Trading Company. They've sworn to depart and never attack another pirate.
Will: And how long will that bargain last?
Elizabeth: As long as we live.
Will doesn't say his thought: as the new immortal captain, he will be dealing with them long after her. But he kisses her cheek and nods.
Will: I will honor the agreement, providing they help us fight the karcharika... We aren't through this yet...
Okay... Done for now! here's the deal. I don't want Will to remain captain, so I'm thinking someone's going to have to come up with a brilliant way to get rid of the flying dutchman and restore Will to mortality. Of course, there's still the evil queen and James to deal with, and eventually some happy reunion scenes. 🙂 So have fun!