In an interview with Game Informer, Naughty Dog co-president Evan Wells revealed that in addition to Uncharted 4 and The Last of Us Remastered, the studio is working on another unannounced title.
When detailing the different undertakings Naughty Dog is tackling at the moment including Uncharted and The Last of Us he said, "We've got other projects in the works that are in the very early stages. We have at least four different pretty significant things going on right now."
Later in the interview he described the unannounced game. "We definitely have another project on the scale of Uncharted in very early pre-production stages. We have the sizable team that it takes to get something like that off of the ground, but it's got a long runway in front of it. We have a lot of great ideas and some stuff that is already getting everybody jazzed and excited. So, it's a long way off before we can really start talking about it in detail."
With Naughty Dog's track record, this is definitely something to get excited about even if it is a long way off. Could it be an Uncharted spin-off, The Last of Us 2, something completely original? Only time will tell.
For now keep it locked on Game Podunk for all things Uncharted 4 and Naughty Dog.
Source: Game Informer