All Naughty Dog have said at this stage is that The story of Joel and Ellie with the fireflies is over and its time for their next chapter, so what im hoping is that the sequel will have ellie and joel in it. Only thing is Joel is like 55 in the game, hes getting old haha, but i think they will definetly make another, Sony has made too much money off this game for it to be over already, and knowing naughty dogs styles, they always make them in 3s haha. Im praying for a new one, earliest we will even hear about it would be in like 2015, the release would probably follow a year or 2 later