Three years since Disney+ hit and award-winning series "WandaVision", Marvel finally unveiled on Monday the trailer of its spin-off show "Agatha All Along" starring Kathryn Hahn as the powerful evil witch Agatha Harkness.

Not only did it end the theories for the official title of the series, it could also shed light on what really happened to Wanda Maximoff (the "Scarlet Witch", played by Elizabeth Olsen) after she collapsed her Darkhold Castle upon herself at the end of "Doctor Strange in the Multiverse of Madness".

READ: Things get out of hand in 'Doctor Strange in the Multiverse of Madness' teaser

In the trailer, Agatha is investigating a lifeless body that seems to be Wanda's —  though the face is not yet shown. With the explicit premise that Wanda is presumed dead, Rio Vidal (Aubrey Plaza) challenges Agatha to get out of the Scarlet Witch's "distorted spell".

In "WandaVision", after their final battle, Wanda "took every bit of power" Agatha had and imprisoned her to a Westview character named "Agnes."

But in this upcoming series, Agatha is optimistic that she can revive her glory days by walking down the Witches' Road with the help of her coven, comprised of Billy Kaplan (Joe Locke), Jennifer Kale (Sasheer Zamata), Alice Wu-Gulliver (Ali Ahn), Sharon Davis Debra Jo Rupp), and Lilia Calderu (Patti LuPone).

The official logline reads, "The infamous Agatha Harkness finds herself down and out of power after the suspicious goth Teen helps break her free from a distorted spell."

"Her interest is piqued when he begs her to take him on the legendary Witches’ Road, a magical gauntlet of trials that, if survived, rewards a witch with what they’re missing. Together, Agatha and this mysterious teen pull together a desperate coven and set off down, down, down The Road," the logline adds.

"It is hilarious, but it also goes very surprisingly deep," Hahn told TVLine in an interview last May. “It's very sophisticated. I think everyone’s going to respond to it and maybe grab hold of something that they really — like in WandaVision — weren’t expecting."

Set to answer fundamental questions like 'Is Scarlet Witch really dead, or can she still be resurrected? Who or what does Billy wish to get from the Witches' Road? How dark Agatha's journey could be and will she be triumphant?', the series excites a multitude of fans who waited for such a long time.

"Agatha All Along" will release its first two episodes on Wednesday, September 18 on Disney+, with episodes continuing to air weekly until November 6.