'The Haunting Of Hill House' Season 2 Fan Theories

The Haunting of Hill House gripped audiences with its story of the Crains, a family torn apart by demons both personal and literal. Even though Netflix hasn't announced a continuation of the series, fans are already formulating theories about what might happen in a Season 2 of The Haunting of Hill House. By the Season 1 finale, the Crains' story was at a mostly happy end, and series creator Mike Flanagan has said the family wouldn't appear in the show if Season 2 gets the green light:

[T]he story of the Crain family is told. It’s done. I think that there are all sorts of different directions we could go in, with the house or with something completely different. I love the idea of an anthology as well. But to me, I felt like the Crains have been through enough, and we left them exactly as we all wanted to remember them... 

Fans are taking Flanagan's statement into account, but not dismissing the idea of the return of Theo or other characters. The most intriguing fan theories cover everything from what role the house itself will play to whether one of the ghosts will get a backstory.