In a livestream yesterday, Naughty Dog’s Arne Meyer revealed that the Uncharted 4 single-player DLC expansion won’t be detailed for some time, as they only began working on it after A Thief’s End released in May:
It will be a while before we have any new info. We didn’t even start working on single-player DLC until after the game launched, so as you can imagine there will be some time for us to work on it. But we’ll reveal it as soon as we’re able to give you more info.
Back in November, Meyer said they had no idea what the single-player DLC would be yet.
Access to the single-player expansion was included in the Triple Pack, but Naughty Dog announced that the Triple Pack is being replaced by the Explorer’s Pack today. Priced at £19.99 (should be $24.99), the Explorer’s Pack includes the single-player expansion and 3,200 Uncharted Points (worth $20), but doesn’t include the post-launch multiplayer packs, as all multiplayer content can be earned through gameplay.