Originally Posted by
Relugus
The Darkhold being in WandaVision, or Chaos Magic being mentioned (the latter is especially funny as Feige pretty much confirmed that in 2016), was something close to none of the various leaks about WandaVision ever cottoned onto. Almost every "leak" for WV stated that Nightmare or Mephisto would appear. They all trumpeted Nightmare and Mephisto near unanimously.
There were various bogus Infinity War leaks, with only one of them getting Red Skull's appearance right (but that very same leak got everything else wrong), and another hilariously claiming Tony would turn into Kang in Endgame.
I consider any suggestion of Wanda creating mutants or "Mephisto's Behind It All" to be massive red flags, because they are fan wishlists.
Let us consider that if the Doctor Strange we saw in No Way Home is, as some speculate, an evil variant (or, drum roll, please, Mephisto), perhaps even the same one we will see in What If? It may just be that Wanda is fighting that evil Strange, and initially mistakes the good Strange for him. I think we will see an evil version of Strange. If Wanda was this massive, all-consuming threat, why have Sylvie and Strange be bigger drivers of the multi-versal shenanigans than Wanda herself? Remember all those leakers saying Wanda would break open the multiverse? None of them mentioned Loki or Strange.
It would make most sense to me, to have Wanda be somewhat lured to the dark side in her pursuit of Billy and Tommy, but to also have her find her resolve in resisting the Darkhold, and for her to continue on her path to mastering chaos magic, and defying Chthon, with Blade around the corner, that would make alot of sense. It's kind of daft to have her rediscover herself, realize she had hurt people, and become Scarlet Witch. Also, if she has her Sokovian accent back, it would look more than a little bit racist (American Wanda = Good, Sokovian Wanda = Evil). I don't even have a problem with her being somewhat of an anti-hero (I love Grimlock, for example), conflicted by the dark source of her magic, but I do have a problem with her being a villain as it reduces her to fodder to fuel other character's stories, and the whole narrative arc of her chaos magic and rediscovery is ruined by her being a villain as there is then no struggle or conflict, it just makes her one-dimensional.