In addition, Naughty Dog said everything you see in the game's teaser trailer above was captured completely in-engine. "As you can see, the visual fidelity for our character models will reach new heights," Naughty Dog community strategist Eric Monacelli said.
Monacelli pointed out that Nathan Drake's character model--at the current state of development--has more than double the number of polygons of Joel from the PlayStation 3 version of The Last of Us.
As for the story for Uncharted: A Thief's End, Naughty Dog writes, "[Nathan Drake] will embark on a globe-trotting journey in pursuit of a historical conspiracy behind a fabled pirate treasure. It's his greatest adventure yet and will test his physical limits, his resolve, and ultimately what he's willing to sacrifice to save the ones he loves."
Uncharted: A Thief's End launches in 2015 exclusively on PS4.