If I recall correctly, Greg Miller and Colin Moriarty (when they were still at IGN) both saw Uncharted 4 and continuously claimed that the game would never make it to 2015. The game needed to be polished for a good release and wouldn't be possible for Q4 2015.
This will hurt it saleswise, but personally I find this better for me being that so many games release in Q4 and it's hard to play all of them in a reasonable timeframe.








