Players have to wait a few months before Uncharted: The Lost Legacy, the standalone expansion to Uncharted 4: A Thief's End, will be exclusively available on PlayStation 4. Meanwhile, Naughty Dog has released a series of FAQs, among which we found some details regarding planned support for PlayStation 4 Pro.
It turns out that The Lost Legacy "will be enhanced for the PlayStation 4 Pro, including support for High Dynamic Range (HDR) and dynamic 4K gaming". Alas, there's no more detail beyond that, so we're not sure what kind of frame-rates we can expect to see.
Uncharted: The Lost Legacy will be available on both PS4 and PS4 Pro from August 23, in both retail and digital format, and anyone who pre-orders the game from select retailers will receive a free code for downloading Jak & Daxter The Precursor Legacy.