My guess is that a 180 or 200mm f/2.8 lens with a Fresnel lens is unlikely. Nikon have not applied for any patents for such a lens, and it would only be marginally smaller than the same lens using conventional elements. If you compare the size of the 105/1.4, 135/2 and 180/2.8, which all have similar size entrance pupil, you'll see that the size does not increase much in spite of the longer focal length, the 180/2.8 is relatively compact so there is not much scope or value in making it smaller.
It would be nice to see more compact telephoto primes such as 105/2.5 and 135/2.8, as they would be much smaller and cheaper than the 70-200/2.8 zooms, and offer more speed compared to the slower 70-200/4 and 70-300/4-5.6 zooms.