After seeing this I also discovered that http://alanwakereturns.com/ was registered last year via the same proxy as other Remedy domains. (although you don't see Remedy itself in the whois)
edit: it's worth noting that the trademark was registered via FastTrack so someone was in a hurry?!
edit2: At end of the second DLC of AW1, Alan writes on a Book named "Return" - sort of a cliffhanger.