Possible Nikon D4 sighting at a hockey game

A reader sent me those two pictures of an unidentified Nikon camera and lens taken at a recent NHL game:

The camera looks like a D3/D3x/D3s. The body and the lens are both covered up, but the shape of the pentaprism is what got me interested:

For comparisons, here are some press photos of the Nikon D3s pentaprism:

One possibility is a some kind of a Nikon D3/x/s body armor like this one here:

What do you guys think?