(Batman, Winter, Lex Luthor, Douglas, Dexter, Nora, Hiro, Leon, Merida and Finn are seen building the weapon against Superman)

Winter: Your brother must have been important to you, huh?

Hiro: You can't even imagine how...

(A flashback of Hiro and Tadashi is seen)

Hiro: Tadashi Hamada was the best student of San Fransokyo.

(The other flashback shows Hiro and Tadashi with Baymax)

Hiro: And it was Tadashi who created Baymax.

(Then we see another flashback showing Hiro and his family)

Hiro: We used to be a happy family, having a happy life...

(The next flashback shows Superman and his allies attacking Disney Universe)

Hiro: But then that bastard invaded our universe...

(Another flashback shows Hiro almost getting killed by Superman until he was saved by Tadashi)

Hiro: If it wasn't for Tadashi, I wouldn't have survived...

(Then another flashback shows Superman hiring Yokai to kill Tadashi)

Hiro: In retaliation, that bastard sent Yokai to kill my brother...

(The last flashback shows Hiro seeing his brother getting killed by Yokai)

Hiro: Because of Superman...

(Flashback ends)

Hiro: Tadashi... (slams the table) died! (calms down and cries) Because of him... Tadashi is... gone...

Winter: He dared to hurt even a child?

Nora: I'm going to break his legs for this!!

Dexter: Grrrr... This Superman is a monster!!!

Batman: How could you, Kal...

(Suddenly Baymax detects four enemies)

Baymax: Intruders detected!

(Then Balrog, Forever Ninja, Captain Gantu and Solomon Grundy)

Forever Ninja: Ten Insurgency members detected. Terminate targets.

Solomon Grundy: Grundy smash rebels!

Balrog: Superman better prepare the money bag when we are done with you!

Gantu: Professor Callaghan sent reminds!

Nora: Time to break some legs.

(Nora fights Solomon Grundy, Leon fights Balrog, Hiro fights Gantu and Dexter fights Forever Ninja. Thanks to the super pill, Leon easily defeats Balrog. Nora breaks Solomon Grundy's legs before doing a grand slam which sends Grundy into Remnant's orbit. Gantu was initially having the advantage against Hiro until he calls for Baymax and the robot punches him before Hiro kicks him, and Dexter uses his cannon to pulverize Forever Ninja.)

Leon: Yeah. That pill really works.

Balrog: (weakly) Money... (falls down)

Leon: It looks like you will not get paid, Balrog.

(Suddenly a blizzard comes in)

Nora: What's happening?

Leon: It looks like she found us...

Batman: And she is not alone.

(Then two ice women come in)

????: Fighting against our lord's commands is so stupid!

????: Those who oppose him have no future!

Leon: I'm not afraid of you, Kolin.

Batman: None of us is afraid, Killer Frost.

(Merida and Finn decide to fight Kolin and Killer Frost. Thanks to his experience against Ice King, Finn manages to hold his own against Killer Frost while Merida has troubles dealing with Kolin, so Leon decides to take action and shoot Kolin's legs while Hiro orders Baymax to hit Killer Frost with a rocket punch, knocking her out.)

Finn: If only Jake was here to warm me up...

Hiro: Superman took your friend from you too?

Finn: Yes... Jake was my best friend... And Superman took him from me...

Winter: We have to find another hideout to resume our job.

(Back to the conquered Atlas Base, Colonel gets shocked by seeing his sister alive)

Colonel: Iris?

Iris: Brother...

(The reploid slibings have a hug)

Colonel: I thought I have lost you...

(Cut to Vale, a portal opens and the heroes jump in it, only to find themselves at the cave of wonders)

Hiro: The Cave of Wonders... This must mean...

(Suddenly Merida notices Aladdin and Jasmine coming in)

Merida: Aye. Thanks for helping us.

Jasmine: No problem, Merida.

Aladdin: You are safe here.

(Some minutes later, the weapon is finally completed)

Winter: It's done. We just need to put the kryptonite and we can prepare to fight against Superman and his regime.

(Suddenly a portal opens revealing Wonder Woman, Black Adam, Yokai and Demitri)

Aladdin: I guess I lowered my guard...

Black Adam: Lower your guards at your peril.

(Nora Valkyrie prepares to fight)

Wonder Woman: Time to crush your pride, little girl.

Nora: You're going out with your legs broken.

(Wonder Woman had experience in hand to hand fights, which causes Nora to be in a big disadvantage, then Merida decides to help Nora shooting an arrow on Wonder Woman's leg, causing her to fall down on her knees and get her legs broken by Nora)

Nora: Thanks, Merida.

Merida: Aye. No problem.

(Cut to Leon and Demitri)

Leon: What caused you to join Superman, Demitri?

Demitri: He promised to help me to rule the demon's world.

(Black Adam tries to attack Leon, only to have his legs broken by Nora while Hiro attacks Yokai with all rage and starts beating him to a pulp)

Hiro: This is for killing Tadashi. (keeps beating Yokai) This is for joining Superman.

(As Hiro keeps beating Yokai, his anger grows to the point it attracted a red power ring turning him into a red lantern)

Leon: Uh-Oh.

Jasmine: What's going on?

Lex Luthor: The Red Lantern Ring chooses those who got anger in their hearts.

Nora: How can we stop it?

????: Leave it up to us.

(Mickey Mouse as a Green Lantern comes in alongside Star Sapphire)

Aladdin: Mickey?

(Mickey and Star Sapphire combine their strengths and they restrain Hiro)

Mickey: Hiro. You have to stop.

Hiro: No... He must die...

Baymax: Tadashi would want this?

Hiro: It doesn't matter...

Star Sapphire: Your brother would never want...

Hiro: Tadashi... died!

(Having no other choice, Aladdin uses the magic lamp and the genius shows the video of Tadashi building Baymax)

https://www.youtube.com/watch?v=qNdr2sHIF_w

(Hiro breaks free from the red lantern ring's influence)

Hiro: Thanks, Aladdin. And sorry, everyone...

(Meanwhile Leon uses his weaponry and shoots down Demitri)

Leon: And the vampire makes four.

(Suddenly some more Disney heroes come in)

Snow White: Hiro...

Hiro: I don't know what happened to me... I was simply...

(Hiro is interrupted by Snow White's hug)

Snow White: It's fine now.

(Callaghan escapes)

Hiro: Wait, Callaghan!

Leon: He is running away!

Batman: Leon.

Leon: Huh?

Batman: Our weapon is already completed.

Tomago: We'll get Callaghan. But next time, in the right way.

(The weapon is completed. But Superman is planning something to destroy the Insurgency before they get a chance of victory. What could be this plan?)