Neil Druckmann just made a post over on PSBlog stating, definitively, that Uncharted 4 will come out next spring. He's aware that "the extra wait will be excruciating". While I don't have too much to add to the matter, I can't say that this surprised me at all. The timing isn't a coincidence either. The Order didn't exactly set the world on fire and with so many games coming out half-cocked last fall, it is safe to say that Naughty Dog isn't willing to leave anything to chance and are making their case for more time early (rather than waiting). Good for you Sony and Naughty Dog. The newest industry trend is the delay (j/k).
Source: PSBlog