After losing her children back in John Byrne and Mike Machlan's run of West Coast Avengers, Scarlet Witch's grief was forcibly repressed and her unaddressed trauma led to her subconsciously attacking the Avengers. Brian Michael Bendis and Olivier Coipel bring things to a breaking point in the event House of M, a powered-up Wanda seeks to recreate her lost family and build a perfect world for them to inhabit. Her world domination ends up being quite brief, but her act of grief ultimately results in the Decimation. Erasing millions of mutant's powers has consequences, and Wanda has been paying for it for years, only recently finding some form of redemption. Throughout all of this, Vision was going through an entire ordeal of dying, being rebuilt, losing his emotional core, and being dead again. However, there was a brief moment where was fully himself and had the opportunity to regain what he and Wanda had lost: their boys.
Related: Vision Gets a Horrifying New Look in Marvel's Dark Ages
In the epic DC/Marvel crossover JLA/Avengers #4, by Kurt Busiek and George Perez, the heroes of the temporarily merged Marvel and DC worlds learn their real histories. As they vow to restore their respective realities, the heroes find themselves under attack from Vision. Refusing to return to a world where his children are dead and Wanda will suffer once more, the syntheziod takes on the combined forces of the Avengers and the Justice League.
In the end, Vision is telepathically brought back in line by Martian Manhunter and talked around by Wanda. Even though any consequences of Vision's attack are averted, the scale of his actions here drastically outsizes Scarlet Witch’s own break from sanity. Wanda chose to create a new reality where
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