With the leak of a number of Uncharted 4: A Thief's End copies, information about the game are starting to come out of the woodwork. The update screen of the hefty five gigabytes day one patch was posted on Reddit:

Luckily, there are no spoilers here, but we can see some of the additional features that will come with the game, including a character model viewer, a "render modes" feature, bonus gameplay modes, single player character skins, a weapon selector feature, a journal viewer and concept art galleries.

Looks like Naughty Dog did not skimp on the bells and whistles for Nathan Drake's last adventure.