If there was a place to find an NVIDIA Shield 2 prototype, I didn't think it would be in a freakin' Canadian pawn shop, but here we are... with some interesting news.
Reddit user 'FwrigginRwootbeer' said they found an NVIDIA Shield 2 prototype that Android Police have confirmed is a unit that was given to game developers to work around with, but never reached the public. What the Redditor found was that the NVIDIA Shield 2 prototype rocked an ARM Cortex-A57 processor @ 1.91GHz, 3GB of RAM< and a 5.9-inch 1440x810 display.
We might not ever see NVIDIA release the Shield 2, but here's hoping.