The thing about Universes are, they're all very different from each other, some are leisurely worlds without superpowers or monsters, some are so dangerous that even Universe Wills cry in despair.
In this condition, the Universe Will has different abilities, some are purely for show, an example is the current Universe they are in, it has no solid power of it's own, which is also a prime reason it was targeted.
The only reason it didn't completely despair was because a certain charlatan(crossed out) Great existence, Ultraman Noa had a statue in this Universe.
A fun fact, Multiverses can sometimes intersect, especially if the other World has a solid object referencing that Multiverse....in the case of Ultraman Multiverse, it's Ultraman as a series.
Returning to topic, to this Universe, Tony's invention is like basically giving someone who doesn't have eyes the ability to see.
That's why, the request went quite smoothly, the Universe was even overjoyed.
_______
[Permission Granted, Please place Item in Slot]
Tony nodded in satisfaction after getting the reply nearly a few hours after he sent the request.
[Tony Stark: It's done! @all, Return to Earth.]
[Zero: Yeah, we're heading back!]
[Lu Mingfei: ?! Zero! Don't chat while driving damn it!]
[Zero:??? This is my body! Not a Mecha!]
[Taichi Yagami: Zero! Look out, an asteroid!]
[Huo Yuhao: I got it!]
[Zero: Phew! Thanks Yuhao!]
Looking at this comedic like messages, Tony had his eyes twitch slightly, these guys....they truly were children.
(5891 Year Old Zero: I'm just a child!)
Something many may have noticed, including Tony himself is that these four seem to have some sort of Obsession.
Obsession with helping people, to make everything better.
Not the Ultraman Spirit of Helping those in need, but more of an obsessive necessity to help.
These people....they didn't seem to have much else as a meaning in life except for a few friends or family, most of their existence was run on those obsessions.
Tony had quite smoothly binge watched Ultraman Zero's series in this World, from it and Zero's narration about the Land of Light, he had a pretty good image of Zero's psychology.
He helped because it made him feel necessary and made him feel he was not the ignored and isolated Ultra, but an Ultraman needed by others, giving him validation....
Similarly, Lu Mingfei, he lacked a goal at the beginning, flowing through life, it could be seen from the Novels of the Dragon Raja series, he lacked a true goal most of the time, leading to him being that loser....
But now, thanks to that former loser accidentally meeting Leo and this group while also being educated by Leo himself, his belief also went into a similar direction, My Goal is helping others.
Taichi Yagami, this version was actually raised quite normally by his Parents, has a loving younger sister and all in all was a normal youth, leading to him actually being the most normal of those four although he also is obsessed with helping others but not to a unreal degree.
Then, Huo Yuhao, his World was a backwards type of World where tech, intelligence, lifestyle, everything was backwards and he had gotten lucky to be helped by a Transmigrator who was dying, which led him to develop a belief of, I also need to help others! That's what he did, I need to do it too.
Although his mental state has developed quite well compared to that time, thanks to his friends over in Douluo and many other factors, he's more and more walking a path of a overly Benevolent Ruler, although he lacks a Ruler's disposition.
Fujimaru Ritsuka who unlike the above people was actually just wanting to go find her parents after saving the World and considering that she even had Ultraman as backing, she would definitely go to the Singularities, so, a traumatized young girl forcing herself to fight on.
The truly normal one, Lin Yu, the group leader, a kind young girl without much traumatic issues, thinks everything may be dangerous and unreal but also wants to grow stronger and live a better life....The most normal among all of them.
In simple words, these were problem children in need of therapy, thought Tony Stark, someone currently traumatized and in denial while acting altruistic.
Ignoring all that, Tony focused on the new panel opened on the Chat Group, a panel which was actually quite empty, except for the random area of garbled red light which was constantly moving.
"No wonder..." Tony sighed, that thing wasn't even in the nearby galaxies, if you wanted to put it into words, that thing was actually shuttling around the other edge of the Universe.
Actually, those guys don't really need to return to Earth, right? Since they're all the strongest right now, couldn't they directly go wipe out the Fallen System?
Right? Unfortunately no, because if that Fallen System has any tricks up it's sleeves and attacks Tony or the other two, they can directly say GG
Yuhao's teleportation range was limited after all, so, for their safety, Mingfei and Taichi had to stay with them because Mingfei could become Leo for a while and Taichi could protect the others if everything get's messed up.
As for why Yuhao and Zero need to stay together? Energy.
It's as simple as that, Zero has to chase after that system meaning he'll inevitably lose his energy chasing so, how would he fight properly? Simple, Yuhao brand power bank.
Guaranteed 5 Star review, never fails, can mass produce Life Gold....hm? Surprised? He could even produce a Planet made of Life Gold if necessary, although the energy consumed will be enormous.
After all, Yuhao's cheat like use of ability is actually by more creating a pseudo real object temporarily and then removing the pseudo or fake part of the Entry.
That leads to the object becoming real, although even creating a pseudo or fake costs a tad bit too much energy in this Universe where powers like creation and reality are inherently suppressed.