We don't need that. DBS have no counter to Almighty + Yhwach landing on the Dragon Ball Universe without a "set rules match" and more of an "Isekai" would ultimately end up in Yhwach soloing the verse.
Soul King Yhwach is a Threat in Dragon Ball Super
Yhwach is a self-proclaimed peace-lover, hates conflict and believes that painful battles should end as soon as possible. He is the Father of the Quincy race and the Emperor of the Wandenreich, with the designation "A" - "The Almighty". He is the son of Soul King, titled given to the being who was rejected into existence, chosen by the old world to change the Chaotic World into the current Bleachverse at the requested blueprint given to him by the 5 treacherous noble houses' head figures. The 5 nobles who betrayed his father, mutilated his body, and sealed him for eons in a state neither alive or dead to hold the universal cycle of souls. At the end of the series Yhwach frees his father from such torture and replaces him as the new Soul King. A day later his life ends at the hands of his son born in darkness with the help of his own power being used against him in the form of a Deux Ex Machina (a plot device whereby an apparently unsolvable problem in a story is suddenly and abruptly solved by an unexpected and improbable event) arrow to stop all of his powers.
Now you're probably wondering how this is going to work? He's a weak character who doesn't make it past Vegeta in the saiyan saga, right? That's probably true. Maybe it's not. There are plenty of ways to scale his fighting level in his own series no doubt. But whatever method people use to scale this character in power level, it doesn't matter at all. Not here at least. I'll show you why Soul King Yhwach would be a disaster in Dragon Ball if he ever stepped foot in that universe.
Of all the abilities that Yhwach possesses, there are only two that are truly awe-frightening: "The Almighty'' and his power to "share his own soul with others''.
1. Soul Distribution Powers
Yhwach was born with the innate ability to distribute a piece of his soul to another when touched. Yhwach acquires power by bestowing an ability on others, which he can see before granting, allowing its bearer to cultivate it, and then take it back for himself. In the series as such there are arguments that he used such abilities as Gremmy's power to give himself the power to speak, Jaymes' power to make himself stronger by giving himself a compliment, Nianzol's power to push Yoruichi away of the Soul King’s palace, Gerard's power to rise from the dead stronger in a gigantic form made of pure energy before his powers were negated by the arrow that ended his life, but we are not here to discuss that. On the other hand it may also apply that these were simply similar powers that were not named which he just possessed.
When Yhwach distributed his soul to others, the wounds that one's soul could not heal on its own, were healed. This power healed the physical, mental and spiritual ailments of those who touched Yhwach. As a person's wound healed, all their knowledge, skills and talents were engraved on the piece of soul they received from Yhwach. Those who were healed in this way had their lifespan drastically reduced, and once the person died, the augmented fragment returned to Yhwach.
And Yhwach can forcibly take back the fragments of his soul that he has distributed. Each time he regains a piece of his soul, Yhwach grows stronger and lives longer.
2. The Almighty
As told by Yhwach himself "The Almighty" are the eyes that proof a "True Quincy" or "Pure Quincy" (depending on translation) it's unknown if other Quincy can achieve this powers; as only Yhwach and his father were the only users of this power at the current time in the story.
The Almighty eyes first ability gives Yhwach the power of omni-precognition, similar to Zuno, Yhwach can see everything that is to occur from the present moment into the far-flung future. He can "know" everything that lies within that gaze. Rather than seeing a linear future, Yhwach observes all possible futures at once like countless grains of sand in the wind, and can thus act accordingly using the knowledge he has gained to anticipate and counter his opponents. He knew of Ichibei's death a thousand years prior to reawakening the almighty powers he had lost after being sealed away a thousand years ago.
The second power of the Almighty is future acausality, which Yhwach declares to be the true power of the Almighty, the ability to alter the future into whatever outcome he desires. Basically it works by taking a specific event in the future and bringing the result of that event into the present without having to go through the steps leading to that future. He has demonstrated using this power by placing spike traps made of his energy where he knows his opponents will be and preemptively attacking them before they realize what occurred. He can also overcome any defenses and countermeasures they use to protect themselves to facilitate his attacks. Even when his physical energy swords are blocked, he can make it so the attack lands and reality warps a wound in the opponent's body. He can even alter the future should it end with his death. But this can be attributed to his using the power of the Miracle as I explained earlier.
The third power demonstrated via this “Almighty” ability is Power Intuition, which makes any power it "knows" become its ally. Together with reactionary power immunity to make that power not only unable to defeat him, but unable to harm him in any way. In conclusion, hax powers are negated and the only way to defeat is with pure physical power, which is probably the only way to defeat him but if you take into account the second ability above is merely impossible.
A concurrent weakness of The Almighty is that it does not seem to work against other beings who also possess omniscient-like abilities to see into the future, such as Mimihagi or his father the Soul King which are confirmed to have nigh-omniscience powers like Zuno in dragon ball. But so far Zuno seems to be superior in this category as he has not shown any weakness like this in his series.
3. The Cerelian Dragon Balls
The Cereal Dragon Balls are a set of dragon balls from the Cereal Planet.
Unlike other dragon ball sets, the Cereal Planet has a set of two Dragon Balls. They are small in nature, which any being could put in their pocket. If said being were wearing clothes. But more importantly, once collected, a password is needed to summon Toronbo.
Toronbo is the wish-granting dragon of Planet Cereal.
At this point in the story it is unknown what limitations, if any, exist on the type of wishes Toronbo can grant; however, they are the only dragon balls known to be able to increase a person's strength to their limits. They even augment beings like Gas and Granolah to the strongest mortals in the dragon ball universe surpassing Goku’s Ultra Instinct and Vegeta’s Ultra Ego divine forms. This set of dragon balls are unique in that some wishes cannot be granted without incurring a cost or price, such as the loss of one's remaining lifespan.
The spell to call the dragon “Takkarapto… Tottoronbo… Pupirittoparo!” is something Monaito once told Granola. A set of three words currently known to only a select few; Monaito, Granola, Zuno, and Elec. And the wish doesn't have to be said in the language of the dragon either as Oatmeal stated.
But the most terrifying thing about these dragon balls is their other unique aspect; they do not turn to stone for any length of time after a single use, allowing them to be used whenever they can be found again. This is scary enough since the dragon ball characters have been able to jump in and grab one of the spheres before they scatter all over the planet.
But everything is safe because if you don't have dragon radar you can't locate the dragon balls in the first place. That is if you are not Master Zuno, a being who has omniscient-like powers that knows pretty much everything in dragon ball universe 7 and of such an object and how to find it. Thanks to him the Heaters were able to find the dragon balls to turn Gas into the strongest warrior in universe 7.
If Yhwach gets his hands on these dragon balls it would be total chaos in the dragon ball series.
4. Absorption & Transformations
Yhwach even has the power of consumption, Yhwach can consume other beings through physical contact, including higher beings, and in doing so, he absorbs their powers and energy, and can contain their great essence within his body, making his power his own. The process can vary in duration, being instantaneous with those of lesser power than him and taking longer with more powerful beings and even transforming him similarly to Majin Buu from the Dragon Ball series.
5. Yhwach’s Other Powers
Before we start, we need to first mention the other abilities that Yhwach has which would be useful in these future battles.
This source quoted above is from an outdated version of
Yhwach's profile in VSBW, credit to the VS Battle Wiki team and its members.
6. Yhwach’s Plan of Attack in Dragon Ball Super
Yhwach was a brilliant military mind who led an empire for thousands of years and his plan to recreate the cosmos of the Bleachverse was almost a success and only failed at the end through his own fault of believing that a vision of the future was merely a dream. He even repeated the same plan that Sosuke Aizen had in mind at the beginning of the story, and succeeded where Sosuke Aizen failed.
Let's start in the world of dragon ball, and skip over the part where Yhwach is transported to that world. Now let's say Yhwach came to the Earth where Goku and his friends live, what would happen next?
As explained before, the ideal plan for Yhwach in this case would be to get those dragon balls after looking at all his alternatives and futures.
We have the option that Yhwach can't just fly to Planet Cereal, right? We don't know if the power of shadows will help him teleport to another planet although he can teleport to other dimensions in his own series. Therefore he will have to go by the safest method - a spaceship. Given his powers of understanding everything he sees with the Almighty, and his human capabilities, Yhwach could get to that planet by going from planet to planet for a few years thanks to his human mind. But if for some reason he couldn't use the power of dimensional travel to get to such a planet for reasons that they are different universes and the planets are not connected like the dimensions are in Bleach.
But what about the Almighty? As explained earlier, it works by taking a specific event in the future and bringing the result of that event into the present without having to go through the steps leading to that future. Yhwach could use the Almighty's power to shorten his journey. Teleporting himself automatically in seconds to the Cereal Planet without having to travel for years.
But if you disagree with this conclusion because of the immense distance between light years we can go the traditional method in which Yhwach travels the universe increasing his power, avoiding the forces of Frieza’s army and others as he reaches the Cereal Planet and even nurturing his knowledge of the next future events to come.
After arriving on the Cereal Planet it will be easy to get the two dragon balls especially with Granolah being a space bounty hunter who is not on the Cereal Planet all the time. He can even use the "Almighty" to have the dragon balls collected at the same time through the future without having to move a muscle or alert his presence on the planet in the present. Something he can repeat continuously in a matter of seconds as the dragon balls on Planet Cereal are not turned to stone after granting a wish, which leads to a multitude of unlimited wishes.
The secret code to summon the dragon is easy to get from Monaito. But if you still want to argue that Yhwach couldn't physically defeat Monaito or make him talk the secret password instead of seeing one of his alternate future visions where Monaito speaks the password out loud. Yhwach simply needs to touch Monaito (and it doesn't have to be in combat if he knows he can’t defeat Monaito) to share his soul with the Namekian and receive all of Monaito's memories when he takes his soul back. But would this work on an alien? Sure. Yhwach already shared his soul with a robot, and a brain in a jar in his own series and Yhwach is basically part alien himself since his father basically came from outside the Bleach Chaotic original world before the current cosmology of the series was created.
Of all the wishes Yhwach could make, such as being the strongest mortal in the universe, becoming immortal or even removing his weaknesses. Yhwach would be affected by the price he has to pay which cuts short his life. Yhwach being thousands of years old and as long as he keeps absorbing souls his lifespan keeps increasing. But he could even use the Almighty to advance time, pay the price of death and revive himself again with the "Almighty" which would allow him to keep the wish with no curse to pay.
Even if his limits go beyond the mortal to the divine realm, since Yhwach is considered in his own series to be the son of the god of the Bleach universe, we don't know if the dragon could make him stronger than the Dragon Ball gods themselves. But one thing is for sure UI and UE are techniques of the gods and angels that Yhwach could acquire in the course of a very short time thanks to his ability "The Almighty" which would allow him to advance the events of the future to the present and change the game. Maybe even one day Beerus will take him in and name him a Destroyer-in-training to become Universe 7's next God of Destruction. As a safety measure in case Zeno wants to do the tournament of power in this timeline to destroy the universes. Which would end in Yhwach overcoming the gods while plotting in the shadows, or being wiped out of existence by the Grant Priest at the end of the tournament of power.
Let me know what you think of the terrifying power known as the "Almighty".