The finale of Disney+ series “VisionQuest” closes the “WandaVision” saga while opening another chapter for its central family. The episode, titled “Forever,” includes a post-credits scene that reveals Elizabeth Olsen’s Scarlet Witch survived her apparent death and connects her return to “Avengers: Doomsday,” scheduled for release on Dec. 18. Major finale spoilers follow.

Before that revelation, Vision, played by Paul Bettany, reunites with his and Wanda Maximoff’s grown-up sons. Ruaridh Mollica’s Tommy Maximoff, a key character throughout “VisionQuest,” is joined by Joe Locke’s Billy Maximoff, whose late appearance brings the father and both sons together.

The post-credits sequence revisits the conclusion of 2022’s “Doctor Strange in the Multiverse of Madness,” when Wanda destroyed the Darkhold across the multiverse and appeared to die beneath the collapsing Wundagore mountain. This time, the footage continues: Robert Downey Jr.’s Doctor Doom removes the rubble covering her and commands her to awaken, declaring that her power will become his. Wanda then gasps and opens her eyes.

The scene confirms speculation about Wanda’s return as the Avengers prepare to confront Doom in “Avengers: Doomsday.” It also follows another encounter between Doom and a powerful Marvel character. A newly added post-credits scene in “Avengers Endgame: Encore” showed him kidnapping the Hulk, played by Mark Ruffalo.

Marvel had hinted at the family’s continuing story before the finale through a social media post written in binary code. Fans decoded the string of zeros and ones to reveal a line from the 2021 “WandaVision” finale: “We could never truly leave each other, even if we tried.”

Olsen’s introduction as Wanda came in a post-credits appearance in 2014’s “Captain America: The Winter Soldier,” followed by a fuller debut in 2015’s “Avengers: Age of Ultron.” The character’s early story included the death of her brother Pietro, played by Aaron Taylor-Johnson, and the devastation of Sokovia. Vision’s death in 2018’s “Avengers: Infinity War” brought another loss.

That grief drove “WandaVision,” Marvel Studios’ first Disney+ television series. Wanda took control of a New Jersey town and reshaped it around American sitcoms, creating a life with a reconstituted Vision and their twin sons. She ultimately relinquished that family, while her encounters with Kathryn Hahn’s Agatha Harkness revealed her identity as the Scarlet Witch. The 2024 series “Agatha All Along” later introduced Locke as the grown-up Billy.

In “Doctor Strange in the Multiverse of Madness,” Wanda’s determination to recover her children, intensified by the Darkhold’s corrupting influence, made her the central villain. After killing those who obstructed her search, she recognized the damage she had caused and destroyed the magical book across the multiverse. Her apparent death left her future uncertain, although Olsen told Variety in 2022 that she hoped to return and was assuming Marvel would bring her back.