Wait, so ALL this is happening in Season 8?
You'd be right to be a little suspicious. For starters, this is Ryan Murphy we're talking about -- fans will no doubt remember the innumerable red herrings that littered the run-up to Roanoke. Also, around January of this year, when all these clues started dropping, Murphy had told EW that Season 8 would not be the crossover season. ("It'll probably be the one after [Season 8]," he said, citing scheduling conflicts -- namely, Bates, whose Netflix show, Disjointed, had yet to be canceled. "We've already met about it and outlined it, but it won’t be next, because some of the people are not available.")
So... how does the crossover news reversal, which came almost half a year later, change things? There's been no indication it will, but Murphy also hasn't clarified this yet, so it's unclear which of the above pieces of info will get tweaked, stay the same, or be shelved until Season 9. If we're using Collins' first cast picture above as a reference point, it seems like most of the developments listed above, especially the bits that have come since March and April, have stuck. (Production is supposed to be under way already, after all.)