These are the first pictures to be released of the first prototype axle for a new ultra-lightweight unicycle hub. No flanges yet, they are still in development. It uses special new materials, with the splines themselves fashioned from purest green unobtainium. Less than a third the weight of KOXX or KH hubs.
As a hint, you should by now be feeling a bit silly. Unobtanium is a matt black finish, not green.
As for being ISIS - it’s got 8 splines, not 12 (or is it 10?), so no. Must be Octalink - are shimano getting into unicycling? They made a BMX groupset last year, surely this is the logical progression.