From the very beginning of WandaVision, it has been reiterated that everything in Westview has been ‘for the children.’ That odd intonation from the mysterious Dottie became reality with the birth of The Vision and Scarlet Witch’s powerful twin sons, Tommy and Billy. The brothers have a long and complex history in the comics as their parents do.
Their lives and deaths have been an integral part of the most important stories in the comics for nearly twenty years. Their apparent deaths pushed Wanda Maximoff over the edge, and their resurrection has helped usher the comics into a more modern era.
In the Marvel Cinematic Universe, the Scarlet Witch’s powers and abilities are growing exponentially. The same has been true in the comics for decades. The first real indication of her escalating powers was the manifesting of her children with Vision.
In the 1985 mini-series The Vision And The Scarlet Witch (written by Steve Englehart with art by Richard Howell), the former Avengers seek a normal life in the suburbs. In the course of the story, Wanda uses her growing power in magic to conceive the twins.
Happiness in suburbia doesn’t last very long. A few years later, their happiness is upended by a villain called Master Pandemonium. Pandemonium was a former actor who made a deal with the Marvel devil, Mephisto, and became a demon.
He believes Tommy and Billy are made from magic harnessed from fragments of his soul. He then abducts and absorbed the souls of the boys back into himself, effectively killing them and setting off a chain of events that would lead to outright disaster for the entire Marvel Universe.
The story took another shocking turn when Mephisto himself appeared. He revealed that the soul fragments Wanda used to create her children weren’t Master Pandemonium’s, but his.
Mephisto had used Master Pandemonium to seek out the missing fragments of his soul rather than do so himself, as he had been wounded in an encounter with Franklin Richards (who is the powerful mutant son of Reed Richards and Sue Storm). Franklin, like Wanda, also has the ability to alter reality.