Slated at first as a rumor, it has been confirmed by Sony that Amy Hennig, long time employee and director for the upcoming Uncharted game for the PS4, is no longer a part of Naughty Dog. Aside from being responsible for the story in the entire Uncharted franchise, Amy is also known for working on the Legacy of Kain series.
It is still unclear if she was fired or if she left willingly, but a still unconfirmed part of the initial rumor was that she was forced to leave the studio by Neil Druckmann and Bruce Straley, directors of The Last of Us, so they can take over the project.
This is the official statement released by Sony:
We can confirm that Amy Hennig has left Naughty Dog. Amy has made significant contributions to the game industry and we appreciate all she has done for Naughty Dog. The development timeline of Uncharted will not be impacted.