It would be nice to see the results for the new Nikkor AF-S 80-400mm f4.5-5.6G, as it is supposed to be an excellent lens.
Also, I'm sure many people are curious about the results for the Sigma 50-500 (new OS & older pre-OS version). If you really want the reach at an affordable price, it is a lens you'd be interested in.
I am interested in questions like, "is the Sigma 50-500 at 500mm worse than the new Nikkor 80-400 at 400mm with cropping for same FOV?" and "is the Sigma 50-500 at 500mm worse than the Nikkor 70-200 f/2.8G with a 2x teleconverter at '400mm' and cropped for the same FOV?"