Unfortunately, he did not say who he was negotiating with, but he did say none of them were members of the Harmon family.
Now, going back to this whole "East Coast horror institution" thing. Could we see the next season heading to New York City, perhaps? Or the surrounding New England area which has a wealth of spooky locations? I can't see the show falling back on the tried and true mental asylum (akin to Session 9). While, yes, American Horror Story calls upon familiar horror tropes, it always manages to avoid expectations.
Keep it here for more!