IANAL, nor have I read the NDA's (I'm hoping they will be publicly released as part of discovery) but I doubt NDA's with either the NSA or CIA will have an exp

IANAL, nor have I read the NDA's (I'm hoping they will be publicly released as part of discovery) but I doubt NDA's with either the NSA or CIA will have an expiry date. A breach of contract on the plaintiff's side could but not necessarily will nullify the NDA. The best outcome for Snowden I think would be if he can demonstrate a greater good, IE: that breaking this contract prevents a larger crime, that would be up to the court to decide. I find it interesting to see that the DOJ is not trying to prevent publication, just trying to intercept financial gains based on the premise that he didn't submit copy for review. At this point they are not claiming that he is actually publishing any confidential material. Somehow I doubt Snowden's main motivation for publishing this book is financial, so I don't know if this will hurt him much..