A user over at the popular games message board Neogaf posted an image he claimed was from a next gen Prince of Persia. Not a sequel to 2008's often overlooked game, but instead another reboot of the series codenamed Prince of Persia Zero 2 (apparently another modern day reboot was in the works before this). Described as something of a "God of War Lite", this image really says very little about the game.
Take it for what it is. An image that may possibly come from an unannounced game early on in development. Key word here is possibly.