Again, I think that a $1700 "fully-featured professional large-sensor camera" can very realistically come out mid-late 2016 (announced NAB 2016).
Sorry to say it. But not by Panasonic or Sony and Canon. Why would they shoot themselves in the foot like that? Once you release a fully-featured professional large-sensor camera for this price you will never be able to charge much more for a high end camera. Of course, it depends how you define fully-featured professional large-sensor camera. If you think the Blackmagic cameras are fully professional then you might be on to something. But if you expect something like a FS7 for this price, forget it, and the FS7 is where I would cut the line for fully-featured professional large-sensor camera.