When catastrophe strikes Arkham Asylum, where will Gotham City house the world's most dangerous criminals, and when inmates are found murdered, what is Batman prepared to do in search of justice? Arkham's madness comes home in ARKHAM MANOR! A bold new series brought to you by the mad minds of Gerry Duggan (Deadpool, Nova) and Shawn Crystal (Deadpool, Wolverine and the X-Men).
Full article here.
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This apparently takes place after Batman Eternal #30... well alright then. Guess we couldn't have pushed this book to next week or something when the book comes out since that would make too much sense.