Kevin Feige didn’t want Wanda Maximoff to reunite with Vision in VisionQuest because the show should “stand on its own”

VisionQuest ended with Vision reuniting with his sons, Billy and Tommy, but Wanda did not appear in the main story. Paul Bettany said Kevin Feige felt a reunion would shift attention back to WandaVision and distract from establishing Vision as a character who could carry his own series.

Wanda does appear in a post-credits scene: Doctor Doom finds her beneath the rubble at Mount Wundagore and revives her, declaring that he will claim her power. Elizabeth Olsen is expected to appear in Avengers: Doomsday, while a recent comment from Anthony Mackie has suggested Vision may return too, leaving a possible family reunion for a later story.