Ok so i'm watching the new BBC America trailer and I spot a shot, its only a brief second but if you have read the rumours then....
Spoiler
At 38 seconds into the BBC America trailer, The Doctor is seen waving his sonic screwdriver at the screen, with a group of people behind him. Look closely and he's clearly aged a lot, Matt Smith is wearing old man make up.
This fits in with the theory that the final episode see's the doctor battling a centuries long war.
As this was posted by spoiler hounds who knew about the wooden Cyberman and the severed cyber head the doctor carries in the poster over a month agom I'd say its a safe bet
That's what you found most interesting about the BBC America trailer? I was more intrigued by the possible reappearance of the hotel room from the god complex. We see a door with 11 on it and the doctor open a door. Surely we'll find out what's behind it!