(Mason and Vixen are seen helping some animals who were about to be dead as they become grateful for their help before leaving.)

Vixen: I heard you like exploring some places. Is that true?

Mason: (nods) Yep. I explored some dangerous jungles, places that were once battlefields, and others.

Vixen: Wow, you are quite an explorer.

Mason: Yeah. I get that a lot.

(Suddenly Kei Fukuide shows up in front of the couple.)

Kei: (smirks) Fancy meeting you here, Mason. Or should I say... (smirks deviously) Zero!

Vixen: You know him?

Mason: Nope, but Zero does.

(Suddenly Zero possesses Mason's body and speaks up.)

Mason?: His name is Kei Fukuide. He is the host of my archenemy, Ultraman Belial!

Vixen: Ultraman Belial?

Mason?: Yes, we have battled several times. And believe it or not, he destroyed this planet once!

(Vixen's eyes widen as she didn't know Earth was once destroyed by Ultraman Belial.)

Mason?: If it weren't for Ultraman King, the entire universe would cease to exist.

(A flashback is shown as Ultraman Belial was seen easily defeating a horde of Ultras in a single blow, and then it cuts to Zero having been defeated by Belial as the other Ultras came to his aid. Belial then summoned a massive bomb which destroyed the Earth once it hit the planet. Then the flashback ends as Kei smirks.)

Kei: And here we are, ready for one more battle.

(Kei's eyes glow red as he pulls a kaiju capsule.)

Kei: Gomora!

(Kei activates Gomora's capsule as his roar is heard, and then he places it in his Loading Knuckle before pulling another capsule.)

Kei: Red King!

(He activates Red King's capsule as his roar is also heard before he places it in his Loading Knuckle and pulls out his Riser as he clicks its button.)

Kei: This shall mark the end for you!

(Kei scans the capsules with his Riser.)

FUSION RISE!

(Kei presses the button and starts his transformation.)

GOMORA! RED KING! ULTRAMAN BELIAL: SKULL GOMORA!

(Kei becomes Skull Gomora, and then the possessed Mason transforms into Ultraman Zero.)

Zero: I am Zero! Ultraman Zero!

Belial (Skull Gomora): Hehehehehe! This will be the end for you, Zero!

Zero: Don't count on it, Belial!

(Zero kicks Skull Gomora before dodging its punch as he elbows its back. Skull Gomora then hits Zero with a tail swag before trying to hit him again, but Zero dodges as Skull Gomora charges up energy and stomps the ground, summoning multiple fireballs which then fly at Zero, who uses his sluggers to deflect them all. Skull Gomora then unleashes a breath of flames from his mouth at Zero, hoping to destroy him, but Zero isn't harmed at all.)

Zero: You're still 20.000 years earlier to beat me, Belial!

Belial (Skull Gomora): (angry) ONORE ZERO!

(Zero kicks Skull Gomora again before grabbing him and slamming him down like a wrestler.)

Zero: Time for some Wild Burst!

(Zero activates his Wild Burst, and as Skull Gomora charges at him, he dodges before kicking the monster several times, which Skull Gomora wasn't able to predict. He then executes his finisher.)

Zero: Howitzer Zero Shoot!

(Zero gathers energy and fires out an explosive red sphere of energy at Skull Gomora, who explodes. Kei is then brought back down as Vixen tries to attack him, but he blocks her attack.)

Kei: (glares) This isn't over yet. I shall return!

(Kei leaves as Zero flies away, and then Mason appears out of nowhere again.)

Vixen: This Ultraman Belial... is definitely not the one to be taken lightly.

(Vixen and Mason rejoin as they share a quick kiss, and the screen fades out.)