(At Wayne Enterprise, a pirate ship is seen approaching the building.)

(A young boy is seen ready to jump out of the ship as he lands on his feet and gets inside the building as he suddenly sees some assassins surrounding him.)

Aaron: Looks like I'm not the only uninvited guest around here.

(He then pulls out a driver.)

(And then he places the driver in his waist as he prepares to transform.)

Aaron: Henshin!

GOKAI CHANGE!

(Aaron transforms into Kamen Rider Gokaiger.)

????: Pirate Rider Power! Yohohoi! (poses) Kamen Rider Gokaiger!

(The assassins charge at Gokaiger, who punches and kicks some of them before drawing his Gokai Sniper as he blocks a sword with it before throwing him at some other assassins.)

Gokaiger: Sorry, but whatever you're looking for, it's mine to catch.

(Suddenly a batarang is thrown close to Gokaiger, who turns to see a shadowy yet familiar figure.)

Gokaiger: Batman...

(Batman then uses his grappling hook at Gokaiger, but the Kamen Rider pulls out a Gokai Key with his free hand, and prepares to change forms.)

KAMEN RIDER SHINOBAT!

(Gokaiger changes to Shinobat, and uses a sword to cut the wire as Batman glares at him, and jumps off as he lands in front of him.)

Gokaiger (Shinobat): You're messing with the wrong treasure seeker, Batman.

Batman: (glares) Who are you, and why are you in Gotham?

Gokaiger (Shinobat): Did I stutter, Bruce Wayne? (Batman gasps) I am a treasure seeker.

(He uses ninjutsu to disappear, and then he reappears, ready to strike Batman, who blocks his attack before dodging other attacks until Gokaiger (Shinobat) eventually kicks him. Gokaiger (Shinobat) tries to slash Batman, who dodges as they have a brief clash until the former throws the latter, who gets up and throws batarangs at Gokaiger (Shinobat), who uses his sword to cut them in half. The Kamen Rider then tries to strike Batman, who kicks one of his legs, and slams his face on the bars. Gokaiger growls and tries to kick Batman, who grabs his leg, and slams him, but he gets up and blocks Batman's incoming attacks and grabs his knee. Batman throws him down, but he kicks one of his legs, and the Dark Knight kicks him in the gut. Batman then charges at him as he tries to strike him, but Gokaiger (Shinobat) blocks his attacks, and slams his face on the bars as he tries to stab him, but Batman dodges and breaks his sword before kicking him like a spartan, and uppercutting him as he grabs him and throws him down before slamming him into a computer. Gokaiger (Shinobat) then punches him in the crotch before punching his chest twice as he strikes relentlessly until he hits Batman's neck, and in retaliation, Batman kicks him down. Both get up and are struggling to keep themselves on their feet as Gokaiger reverts back to his base form, and Batman holds his own neck. As Batman prepares to strike Gokaiger, the latter uses a Gokai Key and executes his finisher.)

GOKAI FINISHER!

(Gokaiger summons all Kamen Riders and Kaiju Heroes to deliver a powerful kick to finish Batman, sending him to crash into a wall as his mouth bleeds while Gokaiger barely gets up.)

Gokaiger: A pirate ALWAYS gets what he wants.

(Gokaiger then proceeds to grab some of Wayne Enterprise's valuable items, and returns to the flying ship with an entire bag of them.)

Gokaiger: It was worth it.

(He reverts back to normal as DeathRay and Jonathan Vincent come in as they notice his injures.)

Jonathan: Damn, you got yourself in a tough battle again, dude.

DeathRay: Let me guess, Batman?

(Gokaiger nods.)

DeathRay: Crap, who knew this world's Batman could give other Batmen a run for their money.

Jonathan: At least, you got the valuables from Wayne Enterprises.

Aaron: Yeah, we'll gain lots of money, and help homeless people.

Jonathan: Yeah, but... (feels a dark aura) uh... we have a problem...

(Aaron then turns to see Rita Kanisuka and Reika Shindai glaring at him.)

Rita: Doing reckless stuff again?

Reika: It's obvious you shouldn't do this stuff without us. You always get injured.

(Aaron sweats as the two girls smirk and nod at each other as they pull him.)

Aaron: Whoa, what are you-

Rita: Now you're gonna have to cuddle with us.

Reika: And this is not negotiable.

(As Aaron gets dragged to the girls' room, DeathRay and Jonathan check on the computer as they locate two dots.)

DeathRay: Looks like we found our new ally, and something extra.

Jonathan: Something extra? Could it be... (remembers Yokaiser) I knew it.

DeathRay: Let me guess, Kutaro Igawa is getting a second chance to prove he deserve to be a Megaforce Hero.

(Jonathan nods as he pulls out his driver.)

Jonathan: You go recruit the new ally. I'll reunite with Kutaro.

DeathRay: All Right, The Daikaiju Megaforce Mercenaries are all rage!

(Jonathan then prepares to transform.)

STANDING BY!

Jonathan: Henshin!

COMPLETE!

(Jonathan becomes Kamen Rider NEXT Orga.)

NEXT Orga: I am no longer Neo Orga, I am now Kamen Rider NEXT Orga!

(He then hops on DeathRay.)

NEXT Orga: Let's go, DeathRay.

DeathRay: YEEEEEE-HAAAAAAA!

(They fly away from the ship as NEXT Orga jumps off to reunite with Yokaiser.)

(Meanwhile in a dojo, a male figure is seen meditating as he remembers the words he heard.)

Batman: This is your fault.

Superman: Look what you did to the Watchtower.

Flash: Why did we accept you in first place?

Wonder Woman: I can't believe we once dated.

(The individual is none other than Richard Phoenix, who was blamed by the Justice League due to an accident in the Watchtower. The only ones who cared about him were Cyborg, the Justice Society (including Wildcat and Doctor Fate), Deadshot and surprisingly, Lex Luthor.)

Richard: (in mind) Damn that so-called Justice League. If there was a way for me to stand up to their injustices...

(Unbeknownst to him, a driver and a scroll appeared beside him. And then everything goes black as the title is shown.)

WARNER BROS. PICTURES PRESENTS!

(A picture of Kamen Rider Gokaiger and his team fighting the Suicide Squad is shown)

A LEGENDARY PRODUCTION.

(Another picture shows a new Ninja Rider becoming a member of the Justice Society.)

IN ASSOCIATION WITH TOHO COMPANY LTD.

(One more picture shows Kamen Rider Yokaiser, and alternate versions of "John Constantine" and "Red Hood" helping Kamen Rider Gokaiger to fight the Legion of Doom led by Vandal Savage.)

DC MOVIES AND JEYMISPEIXOTO STUDIOS PRESENTS.

(The Three Kamen Riders along with their teams, Cyborg, Deadshot and Lex Luthor are shown standing over the defeated Justice League.)

KAMEN RIDER GOKAIGER VS JUSTICE LEAGUE