Bold prediction: Uncharted 4 will release Summer 2015. Horizon or The Last Guardian Winter 2015.

[Gamer_of_the_Year]

I just don't see Naughty Dog having been fine tuning all 3 Uncharted's while finishing u4 after Amy's departure. I think a Uncharted

 Collection is coming, but I think after U4. Hell if I nail this Summer prediction. I can see the collection releasing durin the holiday 2015 with Game of the Year edition of Uncharted 4 with it.