Speaking of the Pandorica, here's what I think:

There's that quote where they're talking about the "most feared being in all the worlds" being caught in that thing. Given what we've seen and know of how The Doctor is viewed in his universe, I'm thinking the Pandorica is empty. I think it's a prison for The Doctor himself. It's trap.

That's what I think. I could be wrong. If so, I hope it's better than that...