I have a feeling AHS Hotel will be set in Purgatory/Hell and reference No Exit and maybe the movie Identity. I think people will gather in this hotel and try to figure how they are connected and most of the people may have committed heinous acts in the past. If Ryan Murphy said the seasons were connected then these are some clues why I think he might reference No Exit
1. In the finale of Coven, Kathy Bates was stuck in the recurring time period to face "her past crimes"
2. Maggie referenced a hotel in Coven
3. The ghost Butler in Coven may come back as a younger version (if its set in the past) unless its a younger version of papa legba
4. Misty was stuck in hell towards the end
No Exit: The play is a depiction of the afterlife in which three deceased characters are punished by being locked into a room together for eternity. It is the source of Sartre's especially famous and often misinterpreted quotation "L'enfer, c'est les autres" or "Hell is other people",[2] a reference to Sartre's ideas about the Look and the perpetual ontological struggle of being caused to see oneself as an object in the world of another consciousness.[3]
http://en.wikipedia.org/wiki/No_Exit
And gagas song lyric reveals her interest and knowledge of the play
"Theres No Exit were in jean-paul sartre hope u dont think my obsession is awkward"