Still earlier than The Last Guardian.
lol I hope we atleast start to see some gameplay by next E3 for Unchated 4. I honestly think that TLG will never come to fruition, and it will end up much like how Blizzard Titan went out, with us not knowing much of the details of the game or what could have been. It's just been way too long, and we haven't seen anything since that one video ages ago. As much as I love Ico and SOTC, I just don't see TLG ever happening.
But yeah if UC4 is targeting Fall/WInter 2015, we should start to see our first bits of true gameplay at E3 this coming year. If not, then we might have to wait til 2016