Doing some research I came across theyearzero.net. This url has been parked and unused since it was registered, but some interesting info about this registration:
Created May 5th 2011 (a couple weeks before schizophreniasdiary)
Registered to the organization THE NULL CORPORATION II (5 years before it was used on Juno)
Registered address is NIN legal representation GELFAND, RENNERT & FELDMAN
Could be nothing, but it shows that someone in the NIN camp was definitely thinking about new Year Zero content in May of 2011, just before the blog popped up. I feel this gives some credibility to the idea that schizophreniasdiary came from NIN.
Thoughts?