While fans of the Marvel Cinematic Universe have had their minds blown by the sheer scope of Wanda Maximoff’s reality-warping abilities, those familiar with the biggest crossover events in Marvel Comics history know that changing the world around her is old hat for the Scarlet Witch. In WandaVision, the Scarlet Witch drew an entire township into her sphere of superpowered influence, but in House of M, Wanda altered the past, present, and future of the entire world.
House of M came hot on the heels of Avengers: Disassembled, a storyline in which Earth’s Mightiest Heroes came under aggression from multiple enemies at the same time - just as WandaVision followed Avengers: Endgame - only to learn that Wanda was unwittingly behind it all. Having re-remembered the existence of her non-existent children, the Scarlet Witch lost control of her mind and then her powers, resulting in mass casualties. But when the Avengers, X-Men, and others came to confront her, Wanda’s brother Quicksilver convinced her there was a way to fix everything. Hijacking Professor Charles Xavier’s telepathic abilities, Wanda unearthed the innermost desires of those closest to her and reshaped reality into a form that she believed would make everyone happy. And, for a time, it worked, with everyone on Earth forgetting about the old reality and accepting Scarlet Witch's House of M as the real deal.
Well… almost everyone, that is.