(In Tokyo, various evil soldiers are seen trying to defeat a certain mecha, but...)

????: Koushiryoku Beam!

(The mecha destroys the evil soldiers with a photon beam. Then it is revaled to be the one who can exceed Gods and conquer devils... Mazinkaiser.)

Mazinkaiser: Rust Tornado!

(Mazinkaiser unleashes a powerful air flow from the mouth grill that is mixed with corrosive acid that cause enemy machines to rust and break down. Suddenly he saw a familiar mech.)

(Inside of the mech is the devious Doctor Hell.)

Dr. Hell: Prepare to Die, Isaac Kabuto!

(Inside of Mazinkaiser is the pilot known as Isaac Kabuto.)

Isaac: Don't bet on it, Doctor Hell! TURBO SMASHER PUNCH!

(A/N: Pretend the Dragon is Doctor Hell's mech.)

(Doctor Hell isn't happy about being hit by Mazinkaiser.)

Dr. Hell: I'll whip you to death, you despicable swine!

(Doctor Hell then tries to hit Mazinkaizer, who dodges the attack.)

Mazinkaiser: Time to end this! FIRE BLASTER!

(Mazinkaiser fires an intense blast of heat at 30,000 degrees Celeius, powerful enough to completely melt Doctor Hell's mecha. Suddenly he detects something.)

Mazinkaiser: I can sense a greater power. Even greater than Baron Ashura and other enemies I've faced. 

(Inside of Mazinkaiser, Isaac remembers of a childhood rival he met during his younger times.)

Isaac: Benjamin Kirby Tennyson! It looks like we're about to meet again! But where might you be?

(Isaac clicks some buttons and locates Ben in Bellwood.)

Isaac: So this is where you live. You better watch out, Ben Tennyson. We have some unfinished business to take care of.

(Isaac then pilots Mazinkaiser, setting its course to Bellwood. Unbeknownst to him, Doctor Hell is still alive and overheard everything he said.)

Dr. Hell: Ben Tennyson, huh? It looks like you have just made another lethal enemy. Mantlewatch won't stop me. As for you and Isaac...

(The screen goes black.)

Dr. Hell: You will die by my hands.

https://youtu.be/yTcxloIP5mQ

Warner Bros Pictures Presents.

A Legendary Production

(A video shows Ben Tennyson and his allies fighting against Union Fake Heroes back then.)

In Association with Man of Action and Brain's Base.

Cartoon Network, RoosterTeeth Productions, Image Comics, Anime Network and A-1 Pictures

(Then other videos show Ben Tennyson along with a team of superheroes named Alien Dino Thunder Force, who fight against Various Villains, Union Fake Heroes, Evil Aliens and Decepticons.)

(Now it shows Ben 10 in his Way Big Form and Grimlock face-to-face with Mazinkaiser as they prepare to fight.)

MEGAFORCE SAGA IN...

Isaac: MAZIN, GO! PLIDER ON!

MAZINKAISER VS ALIEN DINO THUNDER FORCE