Overall, I find this announcement very intriguing. The most intriguing part of it, is the fact that the term "hybrid" has been used. As this is all speculation at the moment, anybody's guess is as good as anyone else's. In regards to what the term "hybrid" may refer to, here is what I thought of:
-hybrid sensor with CDAF/PDAF
-hybrid viewfinder with EVF. Though, I don't see the point in it if there is a perfectly good pentaprism available.
-hybrid could mean that the patent that we saw a while back for interchangeable sensors, may come to realisation.
-I also thought of hybrid film/digital, but dismissed that quickly.
- last one I thought of, is maybe "hybrid" just means an old style camera body, with modern day guts.
Something else that we may have to consider, is the fact that in the rumor, it has been speculated that Nikon will announce this camera in the next month (1-3 weeks in the updated text). I am thinking that if this was some sort of ground-breaking, R&D intensive project, we would have gotten a heads up a lot sooner through the rumor sites. Then again, maybe Nikon was able to keep a lid on this one.
In sum, I think (only speculation) we are going to see a retro styled FF DSLR that is going to be somewhat marketed as a special edition. Whatever it may turn out to be, I am most interested in what is meant by "hybrid".
It seems that Nikon is jumping on the bandwagon of the retro styling that Fuji owns at the moment and they also seem to want to bring forth a no non-sense, straightforward, non-gimmicky camera. Those aspects are what attract many photographers to the likes of Fuji as well.
Anyhow, I suppose we all have to wait until the first weeks of November.