Nikon will announce a new 200-500mm full frame zoom lens, according to the latest rumors. The aperture of this new 200-500mm lens is still unknown.
In the past few years, Nikon has filed several patents for a 200-500mm lens with different variable aperture ranges: f/3.5-5.6, f/4-5.6 and even a joint patent with Tamron for a 200-500mm f/4.5-5.6 lens.
And, there are some similar lenses in the market:
The new Nikon 24-70mm f/2.8 VR lens will also come soon, but I am not sure if the two new lenses will be announced together.
Read more: Nikon Rumors