A website is sharing screenshots of a zoomed in screenshot that is allegedly from an in-development Assassin's Creed game. The screenshot appears to show a character entering a pyramid, and the icon above the players head resembles a sarcophagus. You can also see the Assassin's logo on the shield of the character, take a look.
The Egyptian setting for the game has been teased for years now, and most recently in a mission for Watchdogs 2, where the project is referred alongside previous Assassin's Creed games as "Osiris":
As far as this leak's validity I'm 50/50 on it. Anyone can develop enough of a game for a screenshot and take a blurry picture of it should they put the time in. It also could be an intentional leak by the Ubisoft team as the months tick down to E3. I will say that it has been confirmed by multiple sites before that Egypt will be the next AC location, so maybe that screenshot is legit. We won't know for sure until we see some reveals!