If the Beyonders from Marvel Comics are adapted into the MCU like an imperialistic alien race with advanced technology that transcends many other cultures, with the Phalanx as their own military army.
However, because of their God-complex, they lost to an even greater threat…
However, before their demise, they made an AI named Kang created to operate as the Beyonder's interface system, Kang seeks to restore the Beyonder Empire back to its prime after its demise at the hands of the entity that destroyed them. However, it is in his twisted image as he wants to conquer the Multiverse, at the cost of billions of lives, therefore becoming Kang the Conqueror. Even though the Beyonders were extinct, one survived and is the one the heroes of the Multiverse had encountered in Battleworld.
While the comics Beyonder is an adult with a child-like mentality, this version of the Beyonder is a literal child as he was not like the Imperialistic Beyonders as he has a child-like curiosity and longing to explore the Multiverse. But the other Beyonders considered the Beyonder as nothing but a nuisance to be handled with. As Kang seeks to manipulate the child to embrace the imperialistic ideology of the Beyonder Empire. Kang, however, is just using the child for his powers in order to reign over the Multiverse.
This version of the Beyonders are inspired on the Trisolarans or San Ti from 3 Body Problem while this version of Kang is taking inspiration from AM from I have no Mouth and I Must Scream.