A quick update on the already announced Nikon AF-S NIKKOR 500mm f/5.6E PF ED VR lens:
The new 500mm f/5.6 lens will be very compact with a total length of 24cm. For comparison, the current Nikkor 300mm f/4E PF ED VR lens is 14.7cm, while the Nikkor 500mm f/4E FL ED VR lens is 38.7cm.
The price is expected to be around $4,300/€4,300 (converted from the leaked Asian pricing, the actual US and EU pricing could be slightly different, not sure if taxes are included in the price). For comparison, the current Nikkor 300mm f/4E PF ED VR lens is $1,997, while the Nikkor 500mm f/4E FL ED VR lens is $10,297.
