So this was found in the latest TLOU making of video and many believe it might hint on NDs newest project as they seem a bit out of place for TLOU.
I honestly believe that it is TLOU skins for SP or MP but I have one theory that is a rather stretch but still would like to make it heard:
Sully was claimed to have been in the Navy several times during Uncharted 3. What if the game is a game starring Sully in his young days where they might possibly encounter pirates? ND also really put heavy emphasis on simulating an entire ocean in Uncharted 3. They could very well have done all that extra work in order to have some sort of technology ready for an upcoming game. THOUGHTS?