The Preview of TNOTD in the new DWM basically confirms the accuracy of the leaked synopsis. (I'd love to know where it came from originally.)
Every journey taken by a time-traveller tears a wound in the fabric of reality, and the Doctor has time-travelled more than anyone. But the trail runs cold in Trenzalore, the one place in all of time and space that he should never go. The most dangerous place in the universe… Who is kidnapping the Doctor’s friends, leading him to Trenzalore? Could the Fall of the Eleventh be nigh? Or does an impossible girl hold the key? The Doctor’s past, present, and future lives are in grave danger… and his greatest secret is about to be revealed.
THE DOCTOR: “The path I carved through time and space, from Gallifrey to Trenzalore. My own personal Time Tunnel, leading back to every moment I ever lived. Every step, every tear, every kiss. Even the days I haven’t lived yet. Which is why I shouldn’t be here. The paradoxes… very bad…”