WANDAVISION Stunt Casting Confirms Plans For An Action Scene... Featuring A Coven Of Witches!

Wanda has lost everything, it would be interesting how she copes with it all in the show, expecting a Quicksilver to have a surprise role in this.

Some actual witchcraft in the MCU would be fantastic. Yes, there’s magic in the form of Doctor Strange, but covens of witches sounds so [frick]ing interesting

I hear Hawkeye is pretty good at dispatching witches, of the evil variety

Heck yeah, just what I wanted to see, Wanda learning witchcraft from Agatha Harkness in addition to the powers she already has and truly becoming the Scarlet Witch.

Witches were created by Chthon the Elder God, the first sorcerer, who also imbued Wanda with a fraction of his essence at birth, giving her the ability to wield his Chaos Magic.

The magic Strange uses is driven by knowledge and the mind, the magic Wanda uses is driven by emotion and will. Order Magic was created by Oshtur, and Chaos Magic was created by rival and nemesis, her brother, Chthon.
Wanda lost a brother, Strange lost a sister. For both, pain is an old friend. Both are lonely. They are mystical siblings, and Wanda, in using the power of Chthon for good, is not unlike the Ancient One. Note that "Scarlet" means forbidden or sinful.

Strange and the sorcerers of Kamar Taj are not aware of Wanda using magic because Agamotto (Chthon's nephew) the first sorcerer supreme, destroyed all knowledge of Chaos Magic with a lie, believing it would weaken Chthon.

If you are delving into Wanda's past, who she is, for her Chthon is the most personal and challenging villain. Chthon also created Vampires and Werewolves, and co-created Zombies.
Chthon operates in the shadows, and is mostly unseen, but his personal investment in Wanda brings him out into the open. Note that The Other, who gave Loki the scepter, strongly resembled the depiction of Chthon in the comics, and even is listed in the credits as The Other, the name that Chthon's avatar often goes by.

Chthon's pursuit of Wanda alerts SWORD to his existence and threat, leading to them perhaps hunting Vampires and encountering Blade. SWORD being involved suggests they may well be fighting an enemy who has forces on Earth. Chthon has minions and followers in the physical realm that Nightmare and Mephisto do not.

Marc Spector claims to be the avatar of Khonshu, a claim that would be dismissed...except if it was learnt that Wanda is an avatar of Chthon.

Another key point here is that Wanda learning witchcraft fundamentally changes her; it empowers her and gives her renewed purpose. She truly becomes the Scarlet Witch.

Vision said to Wanda, "It's alright, I'll just feel you". If Chthon broke off a part of himself to give Wanda a fraction of his power, perhaps Wanda broke off a part of herself when she touched the cradle in Age of Ultron (notice that Vision started "dreaming" when she did), and when the mind stone was destroyed, the shard of Chaos Magic from Wanda returned to her soul, and thus Vision is present in her perfect world pocket dimension resulting from her subconscious. The Russo Brothers said Vision became fully human in his final moments, and his emotions took him back to the person he wanted to be with and comfort; Wanda.
I don't think Vision is imaginary, he is real within Wanda's world; there are IMHO thus two fragments; Chthon and Vision, in Wanda's world.