To both of those ideas, Naughty Dog community strategist Eric Monacelli responded, "Ha. Doubtful."
Of course, Monacelli could have also been responding to the idea that Left Behind, the upcoming singleplayer DLC for The Last of Us, will have some sort of Uncharted 4 easter eggs hidden within it. If you recall, Naughty Dog previously left a major easter egg in Uncharted 3 strongly hinting towards the studio's follow-up, The Last of Us. The Easter egg, which Naughty Dog admitted should've been taken out, was a newspaper with the headline that read "Scientists are still struggling to understand deadly fungus."
Personally, I don't think any of the three will happen, so maybe Monacelli was just flat out rejecting all of the questions...
Head over to GameZone to read the rest of the article.