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I honestly would be very surprised to see the 10-24 in that range. While it has IS, full frame f/4 ultra-wide zooms are typically in the $700-$800 range. I'd be very surprised to see it push $1K, given the 14/2.8's $900 tag. (Unless they view it as superior optically to the 14, which would be a tough thing to do). Of course, Nikon's 16-35 f/4 VR is $1250, but for some reason I just don't see it. All the other top UWA zooms for mirrorless are in the same $650-$900 range. Sony's 10-18mm f/4 with IS is $850.
The 23/1.4 is what I would have considered a hopeful price. About right, I expect it at $900. The 56/1.2 I could see at $1K, but I hope it too is in the $800-900 range. Mainly because it's the one I definitely want out of those three. The 23 would be cool, but I don't shoot 35mm very often, so it'd be hard to justify the price...the 10-24 is just going to be too darn big. All the mockups have it as the same size as something like the Tokina 12-24...just too big for a mirrorless kit, IMO.