Each universe has its destined hero.

Universe 7 with Goku.

Universe 13 with Saitama.

It's just two out of many possible examples.

But how about we look at Universe 14's hero, Hyoudou Issei.

Note: What happens here happened many years before the main hero's birth.

Before anything, the fact that there were a lot of Earths in the multiverse, made it too boring for Zeno-sama to manage.

So a certain and certainly foolish at that Saiyan made the "interesting" idea to merge all Universes together, for the sake of being able to help fight off the forces of evil, as they're all combined into one Earth.

Goku made the pledge to help raise heroes around the singular universe to protect the new singular Earth.

Little did he know there was already an existing force for that.

And there were more existing, far more powerful forces of evil, ready at one's beck and call.

—

At the Hero Association

1 year post-universe merge

The higher ups had a meeting with available S-class heroes and because Genos and Bang were included, they brought Saitama along because he had nothing better to do.

"And now we're asking you to save the Earth!" The representative named Stitch exclaims.

"Whatever's going on, it better be worth calling all of us here. If it's a load of crap, I'm gonna tear this whole building apart." The hero Metal/Kinzoku Bat angrily says.

"If you think you can, go on and try, pillbug head!" Tatsumaki provokes Metal Bat."

"Hurry up and get on with it." Flashy Flash calmly says with his eyes closed, clearly annoyed at the argument.

"The great seer, Madame Shibabawa, is dead!" Stitch exclaims.

"While looking into the future for the next few years, she popped a cough drop in her mouth and ended up choking on it..."

"So we have to figure out how to prevent disasters without the help of predictions." Darkshine suggests.

Saitama didn't know who Shibabawa was, so Puri-Puri Prisoner gives proper context.

"She left this note, it is a prophecy that will absolutely come to pass."

The hologram magnifies what it says on the note.

All the heroes say it in shocked unison except for Saitama who said it uncaringly.

""THE EARTH...

...IS IN TROUBLE!?""

—

A few days later...

Elsewhere...

The world is quiet. Too quiet. But silence is what some might desire in their lives, but sadly, nothing lasts forever.

In a hospital, an experiment that will change the life of a boy and the people around him forever has taken place. A dead person's internal organs has replaced the organs of a dying boy, who barely survived birth.

This will be touched upon later in the story. Or not.

His name? As of yet, none, but one thing's for certain. His last name is, Hyoudou. The only Hyoudou child to survive birth in the family.

Goku while farming for Chi-Chi...

Vegeta while training in the gravity chamber...

Everyone except Marron at the Kame House...

A certain time traveler...

And many others...

...sensed a massive energy spike at the hospital!

A ship appears out of nowhere in front of Capsule Corp.

It's Future Trunks's time machine!

Considering the merge of universes, we can say that Future Trunks's timeline had a similar outcome except it has been ruined by the trouble that has been correctly predicted by Madame Shibabawa.

He came to warn Goku and the others of the enemy's emergence and what they are capable of, and why the known heroes were defeated and yes, even Saitama was defeated. This might be touched upon in the future of this timeline.

It all began with the death of the death of a teenager, the chosen hero of a certain universe who possessed the power of the Red Dragon Emperor.

"It all started with the death of this teen." F-Trunks (which we will now refer to him as for the sake of not being confused with present Trunks) presented to Goku and the others.

"His name is Hyoudou Issei and he has the power and potential far surpassing even you Goku." Everyone was shocked by this development. I mean who wouldn't be?

"Today marks the day of his birth, which was the massive energy spike you sensed earlier."

"That certainly explains a lot, but why're you telling this to us Trunks?" Goku questions Trunks.

"I'm gathering the strongest heroes around this singular universe now that my universe was also combined with all others. So I'm going to the parents; Saitama and Miki Hyoudou-"

"-considering Saitama is also a hero of his respective universe prior. Only Saitama should know of this. If Lord Beerus and Whis asks, it's a matter of life and death for this timeline." F-Trunks continues on.

"Oh I get it now! You want us to protect and train him and prevent his death in order to save our world and your timeline as well!" Goku exclaims.

"That's right. However, I still don't know how he died, it might be due to supernatural causes therefore we need to tread lightly. This situation is far worse than Black."

"You can count on us Trunks!" Goku gives a thumbs up.

"Thank you guys. I better leave before Lord Beerus and Whis find out I'm here again." Trunks gives his father the peace sign with his father (Vegeta) doing it back.

F-Trunks gets back in his ship and quickly takes off.

At that same moment, Beerus the God of Destruction of Universe 7 and his teacher/guardian Whis arrive for some food.

"We sensed an temporal anomaly again, similar to what happened with Black. Are we wrong to assume such?" Whis slightly angry asks the group.

Everyone sweat dropped.

Goku and the others explain everything that's happening and what will happen in the future.

"I see, then this is what we should do." Whis explains his plan for over the next few

years.

And done with the prologue! Let me know what you think.

And remember, always wash your pp.