I think every bit of news about WandaVision or Doctor Strange 2, real or fake, is going to terrify me with the prospect of "Wanda goes House of M and Strange has to put her down." I don't think it will happen but we are talking about a franchise that is heavily based on 2000s Marvel comics (which is why I fully believe that Young Avengers is being set up).
The one consolation I have is that it's no longer politically correct to portray mental illness as something that makes people go evil and kill their friends (and shouldn't be).
Elizabeth Olsen kind of hinted at this the other day:
I really winced at that quote because of the "always" - but then she probably hasn't read many comics beyond House of M and maybe the Robinson series - but all I can do is hope that they understand now that it's not supposed to be "stigmatized" in the way that it was in 2004-5.
Mostly I think that's why I'm so disappointed in not having any comics to follow, because I don't enjoy reading rumors and real/fake leaks about 2021. Whatever we get will never be as bad as I can
imagine it being but it's still not much fun to think of how a story of Wanda creating her own reality by accident (which seems increasingly what WandaVision will probably be about) could go horribly wrong.