The VisionQuest finale has streamed on Disney+, closing Marvel’s WandaVision trilogy with a post-credits scene that brings back Elizabeth Olsen’s Scarlet Witch and sets her up for Avengers: Doomsday. Warning: this post contains spoilers for the finale.

Episode eight, “Forever”, streamed on Tuesday, 10 November at 6 p.m. Pacific time, and all eight episodes of the series are now available. The series closes the trilogy that began with WandaVision in 2021 and continued with Agatha All Along.

The series stars Paul Bettany as White Vision, the android Avenger rebuilding his memories after his death at the hands of Thanos and his reconstruction by the agency SWORD. James Spader returns as Ultron, and Emily Hampshire plays E.D.I.T.H., the artificial intelligence created by Tony Stark. The showrunner is Terry Matalas.

The finale itself brings Vision’s story to a close, reuniting him with his sons Billy and Tommy, played by Joe Locke and Ruaridh Mollica. But it is the post-credits scene that has set the Marvel fandom alight.

The scene revisits the climax of 2022’s Doctor Strange in the Multiverse of Madness, in which Wanda Maximoff brings Mount Wundagore crashing down on herself to destroy the Darkhold, the book of dark magic, across the multiverse. For four years, fans have debated whether she survived.

New footage continues the scene, as a hooded figure uses green magic to lift the rubble away from Wanda’s body. The figure is Robert Downey Jr.’s Doctor Doom, making his first appearance in a Disney+ project. “Scarlet Witch, awaken,” he says. “Your power will be mine.” Wanda’s eyes shoot open.

The scene was not included in the advance screeners sent to the press, which is why the reaction to it has been so breathless. It appears to confirm that Olsen will return as Wanda in Avengers: Doomsday, although she is not yet on the film’s announced cast list, and that she will be in Doom’s power rather than fighting alongside the Avengers.

Avengers: Doomsday is due in cinemas in December, on 18 December in the United States and 16 December in the United Kingdom, and the VisionQuest scene is the most direct piece of set-up for it yet released.

The finale was moved up by two weeks from its originally planned date of 25 November, and Marvel also released a companion VisionQuest podcast special on finale night. No second season has been announced.

For Marvel, the finale is the end of a trilogy that began as an experiment in television and became one of the studio’s most acclaimed projects. For fans, it is the return of a character many thought was gone for good, and the beginning of the countdown to Doomsday.